https://mediawiki.middlebury.edu/LIS/index.php?title=Network_Troubleshooting_Flowchart&feed=atom&action=historyNetwork Troubleshooting Flowchart - Revision history2024-03-28T20:00:43ZRevision history for this page on the wikiMediaWiki 1.35.14https://mediawiki.middlebury.edu/LIS/index.php?title=Network_Troubleshooting_Flowchart&diff=41852&oldid=prevNathan Burt at 23:13, 16 October 20222022-10-16T23:13:34Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>169 - a computer that is connected to a locally-working Ethernet, has no access to the campus DHCP server.<br>192 or 10 are private network addresses. These would either be original default settings that a system came with, or (more likely) the result of a computer getting configuration information from a DHCP server other than the proper Middlebury College server. This could either be settings retained from a home network, or a machine could be a victim of a rogue DHCP server—a personal computer improperly configured to act as a DHCP server.<br>To find the address of a rogue DHCP server on a Windows computer open a command window and type ipconfig /all. Under the stuff it lists for Ethernet adapter, note the DHCP Server IP address. Ping that address. Then type arp –a; among the Internet Address and Physical Address pairs listed you will see the physical address corresponding to the DHCP server’s IP address. Put it in the ticket and assign to the Voter gang. <br>172 Network Ranges<br>Range VLAN Description<br>'''140.233.18x.xxx'''&nbsp;Midd_Secure Secured Wireless. Should have access to all domain resources. <br>172.17.xxx.xxx Registration Unregistered Computer, wired connection <br>172.18.xxx.xxx Quarantine Quarantined due to Infection or Ill Behavior , wired connection.<br>172.19.xxx.xxx Penalty Box Infected or not updated computer, wired connection <br>172.20.xxx.xxx Midd_Unplugged Unsecured Wireless. Internet access only. <br>Off Campus Student Housing<br>Courtesy of Peter Lubans, here is the list of off-campus houses that are being used for student housing&nbsp;:<br>The housing code is the SSID of the wireless network within each house, and for the hubs that are working, the WEP password is available by request. <br>Off-Campus Locations&nbsp; -- '''need to update!!!'''<br>Location Housing Code Room Numbers <br>1229 South St Ext SSE 001, 201, 202, 203, 204, 205<br>242 College Street CL2 201, 202, 203 <br>131 Franklin Street F13 101, 102, 201 <br>77 Main St, Apt 1 M77 101, 102 <br>77 Main St, Apt. 2 M77 201-1, 201-2 <br>82 Weybridge, Apt 1 WY1 101, 102 <br>82 Weybridge, Apt 2 WY2 201-1, 201-2, 202 <br>82 Weybridge, Apt 3 WY3 301, 302 <br>594 Weybridge WY5 001, 002, 003 <br>100 South Main SM0 <br>102 South Main SM2<br>Campus Wired Ethernet Subnet List 140.233.x.x<br></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>169 - a computer that is connected to a locally-working Ethernet, has no access to the campus DHCP server.<br>192 or 10 are private network addresses. These would either be original default settings that a system came with, or (more likely) the result of a computer getting configuration information from a DHCP server other than the proper Middlebury College server. This could either be settings retained from a home network, or a machine could be a victim of a rogue DHCP server—a personal computer improperly configured to act as a DHCP server.<br>To find the address of a rogue DHCP server on a Windows computer open a command window and type ipconfig /all. Under the stuff it lists for Ethernet adapter, note the DHCP Server IP address. Ping that address. Then type arp –a; among the Internet Address and Physical Address pairs listed you will see the physical address corresponding to the DHCP server’s IP address. Put it in the ticket and assign to the Voter gang. <br>172 Network Ranges<br>Range VLAN Description<br>'''140.233.18x.xxx'''&nbsp;Midd_Secure Secured Wireless. Should have access to all domain resources. <br>172.17.xxx.xxx Registration Unregistered Computer, wired connection <br>172.18.xxx.xxx Quarantine Quarantined due to Infection or Ill Behavior , wired connection.<br>172.19.xxx.xxx Penalty Box Infected or not updated computer, wired connection <br>172.20.xxx.xxx Midd_Unplugged Unsecured Wireless. Internet access only. <br>Off Campus Student Housing<br>Courtesy of Peter Lubans, here is the list of off-campus houses that are being used for student housing&nbsp;:<br>The housing code is the SSID of the wireless network within each house, and for the hubs that are working, the WEP password is available by request. <br>Off-Campus Locations&nbsp; -- '''need to update!!!'''<br>Location Housing Code Room Numbers <br>1229 South St Ext SSE 001, 201, 202, 203, 204, 205<br>242 College Street CL2 201, 202, 203 <br>131 Franklin Street F13 101, 102, 201 <br>77 Main St, Apt 1 M77 101, 102 <br>77 Main St, Apt. 2 M77 201-1, 201-2 <br>82 Weybridge, Apt 1 WY1 101, 102 <br>82 Weybridge, Apt 2 WY2 201-1, 201-2, 202 <br>82 Weybridge, Apt 3 WY3 301, 302 <br>594 Weybridge WY5 001, 002, 003 <br>100 South Main SM0 <br>102 South Main SM2<br>Campus Wired Ethernet Subnet List 140.233.x.x<br></div></td></tr>
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</table>Nathan Burthttps://mediawiki.middlebury.edu/LIS/index.php?title=Network_Troubleshooting_Flowchart&diff=11475&oldid=prevNathan Burt at 21:30, 22 December 20092009-12-22T21:30:15Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 21:30, 22 December 2009</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment.&nbsp; Please do not put sensitive information here - as this is publicly available. </div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment.&nbsp; Please do not put sensitive information here - as this is publicly available. </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>SAMPLES:</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>SAMPLES: </div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[http://www.montevallo.edu/cs/helpdesk/Student_Self-Help_Network_Troubleshooting_Flowchart.pdf http://www.montevallo.edu/cs/helpdesk/Student_Self-Help_Network_Troubleshooting_Flowchart.pdf]<del class="diffchange diffchange-inline"><br>[http://www.proprofs.com/webschool/download/?filename=Troubleshooting_network_problems.pdf http://www.proprofs.com/webschool/download/?filename=Troubleshooting_network_problems.pdf]<br>[http://www.google.com/search?q=network+troubleshooting+flowchart http://www.google.com/search?q=network+troubleshooting+flowchart]<br></del></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[http://www.montevallo.edu/cs/helpdesk/Student_Self-Help_Network_Troubleshooting_Flowchart.pdf http://www.montevallo.edu/cs/helpdesk/Student_Self-Help_Network_Troubleshooting_Flowchart.pdf]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del class="diffchange diffchange-inline">Midd</del>-<del class="diffchange diffchange-inline">specific </del>IP&nbsp;<del class="diffchange diffchange-inline">info</del>:</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>-<ins class="diffchange diffchange-inline">-very comparable to MIDD troubleshooting - step for AV software install can be skipped, watch for quarantine, penalty and/or interpretation of </ins>IP <ins class="diffchange diffchange-inline">ranges useful?&nbsp; Differentiate between issues to self-help and when to contact&nbsp;</ins>&nbsp;<ins class="diffchange diffchange-inline">&nbsp;&nbsp;<br>[http://www.proprofs.com/webschool/download/?filename=Troubleshooting_network_problems.pdf http://www.proprofs.com/webschool/download/?filename=Troubleshooting_network_problems.pdf]<br>[http://www.google.com/search?q=network+troubleshooting+flowchart http</ins>:<ins class="diffchange diffchange-inline">//www.google.com/search?q=network+troubleshooting+flowchart]<br></ins></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>169 - a computer that is connected to a locally-working Ethernet, has no access to the campus DHCP server.<br>192 or 10 are private network addresses. These would either be original default settings that a system came with, or (more likely) the result of a computer getting configuration information from a DHCP server other than the proper Middlebury College server. This could either be settings retained from a home network, or a machine could be a victim of a rogue DHCP server—a personal computer improperly configured to act as a DHCP server.<br>To find the address of a rogue DHCP server on a Windows computer open a command window and type ipconfig /all. Under the stuff it lists for Ethernet adapter, note the DHCP Server IP address. Ping that address. Then type arp –a; among the Internet Address and Physical Address pairs listed you will see the physical address corresponding to the DHCP server’s IP address. Put it in the ticket and assign to the Voter gang. <br>172 Network Ranges<br>Range VLAN Description<br>'''140.233.18x.xxx'''&nbsp;Midd_Secure Secured Wireless. Should have access to all domain resources. <br>172.17.xxx.xxx Registration Unregistered Computer, wired connection <br>172.18.xxx.xxx Quarantine Quarantined due to Infection or Ill Behavior , wired connection.<br>172.19.xxx.xxx Penalty Box Infected or not updated computer, wired connection <br>172.20.xxx.xxx Midd_Unplugged Unsecured Wireless. Internet access only. <br>Off Campus Student Housing<br>Courtesy of Peter Lubans, here is the list of off-campus houses that are being used for student housing :<br>The housing code is the SSID of the wireless network within each house, and for the hubs that are working, the WEP password is available by request. <br>Off-Campus Locations&nbsp; -- '''need to update!!!'''<br>Location Housing Code Room Numbers <br>1229 South St Ext SSE 001, 201, 202, 203, 204, 205<br>242 College Street CL2 201, 202, 203 <br>131 Franklin Street F13 101, 102, 201 <br>77 Main St, Apt 1 M77 101, 102 <br>77 Main St, Apt. 2 M77 201-1, 201-2 <br>82 Weybridge, Apt 1 WY1 101, 102 <br>82 Weybridge, Apt 2 WY2 201-1, 201-2, 202 <br>82 Weybridge, Apt 3 WY3 301, 302 <br>594 Weybridge WY5 001, 002, 003 <br>100 South Main SM0 <br>102 South Main SM2<br>Campus Wired Ethernet Subnet List 140.233.x.x<br></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">'''Problem''' w/ any network app? - try web browser</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">CM? - resolve, else IP&nbsp;address?</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">Confirm plugged directly into wall jack!&nbsp; Not a hub, router, switch with wired or wireless connection!</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">media disconnected, 0.0.0.0, 169., - alternate jack, cable, computer? - possible jack or network problem - collect IP # (or message such as "media disconnected"), MAC address, Jack label, permission, alt. contact info</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">192., 10. address? - contact Helpdesk ("arp -a" information - all hardware addresses listed), MAC address, alt contact</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">140 address? - should be all set - if not, generally proxy, virus, or other issue - can troubleshoot in walk-in helpdesk - collect IP address</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">172 address? - record and determine whether wireless, registration, penalty, quarantine - MAC address</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">'''Background''' information for study:</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">7-layer network model - theoretical, but the complexity of networking, and understanding of troubleshooting steps to take come through</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">DHCP - basics of...</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">NAT - basics of... default configuration for Internet Connection Sharing and most home networking devices (alternative is 'bridged mode' - device acts as a dumb hub)</ins></div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">ipconfig /? - info available with /all, /release, /renew, /flushdns</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">arp -a</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">&nbsp;</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">Midd-specific IP&nbsp;info: </ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>169 - a computer that is connected to a locally-working Ethernet, has no access to the campus DHCP server.<br>192 or 10 are private network addresses. These would either be original default settings that a system came with, or (more likely) the result of a computer getting configuration information from a DHCP server other than the proper Middlebury College server. This could either be settings retained from a home network, or a machine could be a victim of a rogue DHCP server—a personal computer improperly configured to act as a DHCP server.<br>To find the address of a rogue DHCP server on a Windows computer open a command window and type ipconfig /all. Under the stuff it lists for Ethernet adapter, note the DHCP Server IP address. Ping that address. Then type arp –a; among the Internet Address and Physical Address pairs listed you will see the physical address corresponding to the DHCP server’s IP address. Put it in the ticket and assign to the Voter gang. <br>172 Network Ranges<br>Range VLAN Description<br>'''140.233.18x.xxx'''&nbsp;Midd_Secure Secured Wireless. Should have access to all domain resources. <br>172.17.xxx.xxx Registration Unregistered Computer, wired connection <br>172.18.xxx.xxx Quarantine Quarantined due to Infection or Ill Behavior , wired connection.<br>172.19.xxx.xxx Penalty Box Infected or not updated computer, wired connection <br>172.20.xxx.xxx Midd_Unplugged Unsecured Wireless. Internet access only. <br>Off Campus Student Housing<br>Courtesy of Peter Lubans, here is the list of off-campus houses that are being used for student housing<ins class="diffchange diffchange-inline">&nbsp;</ins>:<br>The housing code is the SSID of the wireless network within each house, and for the hubs that are working, the WEP password is available by request. <br>Off-Campus Locations&nbsp; -- '''need to update!!!'''<br>Location Housing Code Room Numbers <br>1229 South St Ext SSE 001, 201, 202, 203, 204, 205<br>242 College Street CL2 201, 202, 203 <br>131 Franklin Street F13 101, 102, 201 <br>77 Main St, Apt 1 M77 101, 102 <br>77 Main St, Apt. 2 M77 201-1, 201-2 <br>82 Weybridge, Apt 1 WY1 101, 102 <br>82 Weybridge, Apt 2 WY2 201-1, 201-2, 202 <br>82 Weybridge, Apt 3 WY3 301, 302 <br>594 Weybridge WY5 001, 002, 003 <br>100 South Main SM0 <br>102 South Main SM2<br>Campus Wired Ethernet Subnet List 140.233.x.x<br></div></td></tr>
</table>Nathan Burthttps://mediawiki.middlebury.edu/LIS/index.php?title=Network_Troubleshooting_Flowchart&diff=11166&oldid=prevNathan Burt at 15:38, 17 December 20092009-12-17T15:38:35Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:38, 17 December 2009</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment.&nbsp; Please do not put sensitive information here - as this is publicly available.</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment.&nbsp; Please do not put sensitive information here - as this is publicly available. </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
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<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">[http://www.montevallo.edu/cs/helpdesk/Student_Self-Help_Network_Troubleshooting_Flowchart.pdf http://www.montevallo.edu/cs/helpdesk/Student_Self-Help_Network_Troubleshooting_Flowchart.pdf]<br>[http://www.proprofs.com/webschool/download/?filename=Troubleshooting_network_problems.pdf http://www.proprofs.com/webschool/download/?filename=Troubleshooting_network_problems.pdf]<br>[http://www.google.com/search?q=network+troubleshooting+flowchart http://www.google.com/search?q=network+troubleshooting+flowchart]<br></ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">Midd-specific IP&nbsp;info:</ins></div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr>
<tr><td colspan="2"> </td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins class="diffchange diffchange-inline">169 - a computer that is connected to a locally-working Ethernet, has no access to the campus DHCP server.<br>192 or 10 are private network addresses. These would either be original default settings that a system came with, or (more likely) the result of a computer getting configuration information from a DHCP server other than the proper Middlebury College server. This could either be settings retained from a home network, or a machine could be a victim of a rogue DHCP server—a personal computer improperly configured to act as a DHCP server.<br>To find the address of a rogue DHCP server on a Windows computer open a command window and type ipconfig /all. Under the stuff it lists for Ethernet adapter, note the DHCP Server IP address. Ping that address. Then type arp –a; among the Internet Address and Physical Address pairs listed you will see the physical address corresponding to the DHCP server’s IP address. Put it in the ticket and assign to the Voter gang. <br>172 Network Ranges<br>Range VLAN Description<br>'''140.233.18x.xxx'''&nbsp;Midd_Secure Secured Wireless. Should have access to all domain resources. <br>172.17.xxx.xxx Registration Unregistered Computer, wired connection <br>172.18.xxx.xxx Quarantine Quarantined due to Infection or Ill Behavior , wired connection.<br>172.19.xxx.xxx Penalty Box Infected or not updated computer, wired connection <br>172.20.xxx.xxx Midd_Unplugged Unsecured Wireless. Internet access only. <br>Off Campus Student Housing<br>Courtesy of Peter Lubans, here is the list of off-campus houses that are being used for student housing :<br>The housing code is the SSID of the wireless network within each house, and for the hubs that are working, the WEP password is available by request. <br>Off-Campus Locations&nbsp; -- '''need to update!!!'''<br>Location Housing Code Room Numbers <br>1229 South St Ext SSE 001, 201, 202, 203, 204, 205<br>242 College Street CL2 201, 202, 203 <br>131 Franklin Street F13 101, 102, 201 <br>77 Main St, Apt 1 M77 101, 102 <br>77 Main St, Apt. 2 M77 201-1, 201-2 <br>82 Weybridge, Apt 1 WY1 101, 102 <br>82 Weybridge, Apt 2 WY2 201-1, 201-2, 202 <br>82 Weybridge, Apt 3 WY3 301, 302 <br>594 Weybridge WY5 001, 002, 003 <br>100 South Main SM0 <br>102 South Main SM2<br>Campus Wired Ethernet Subnet List 140.233.x.x<br></ins></div></td></tr>
</table>Nathan Burthttps://mediawiki.middlebury.edu/LIS/index.php?title=Network_Troubleshooting_Flowchart&diff=11165&oldid=prevNathan Burt: New page: mark as stub? Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment. Please do not put sensitive information here - as...2009-12-17T15:28:52Z<p>New page: mark as stub? Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment. Please do not put sensitive information here - as...</p>
<p><b>New page</b></p><div>mark as stub?<br />
<br />
Currently, this is scratch space for work materials needed to develop flowchart specific to Midd College environment.&nbsp; Please do not put sensitive information here - as this is publicly available.</div>Nathan Burt