DHCP

Dept DHCP service

December IRIS Server Patching

December 8, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, December 9th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday, Wednesday, or Thursday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, December 10th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

Linux servers lists.eecs, iris2.eecs (for access to the network and roster databases) will be patched and rebooted Wednesday night. DNS servers cronus and themis may also be briefly unavailable while rebooting at approximately 8:00pm Tuesday.

On Thursday, December 11th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled). Linux login servers login.eecs/login-mfa.eecs will also be patched and rebooted around this time.

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November IRIS Server Patching

November 7, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, November 11th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday, Wednesday, or Thursday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, November 12th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

On Thursday, November 13th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled). Linux login servers login.eecs/login-mfa.eecs will also be patched and rebooted around this time.

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October IRIS Server Patching

October 10, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, October 14th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday, Wednesday, or Thursday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, October 15th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

Linux servers lists.eecs, iris2.eecs (for access to the network and roster databases) will be patched and rebooted Wednesday night. DNS servers cronus, themis, and rhea may also be briefly unavailable while rebooting at approximately 8:00pm Tuesday.

On Thursday, October 16th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled). Linux login servers login.eecs/login-mfa.eecs will also be patched and rebooted around this time.

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Temporary loss of DHCP network support for some desktops, Sep 13

September 15, 2025 by Lars Rohrbach

Late Saturday, September 13, an issue arose with our automatic DHCP support of registered desktop machines (wired network support of desktops/workstations without fixed IP addresses).

This appears to have affected devices with hostnames beginning with letters r through z, which have network registrations older than one year. Those devices would have lost their DHCP lease, and so would have lost their network connection, sometime early Sunday.

We have restored a known-good version of the DHCP support file for these hosts, and they should generally come back online with no intervention needed. Some devices may need to be rebooted, if they don’t come back online automatically.

Staff are continuing to investigate the root cause of the issue.

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September IRIS Server Patching

September 5, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, September 9th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday, Wednesday, or Thursday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, September 10th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

On Thursday, September 11th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled). Linux login servers login.eecs/login-mfa.eecs will also be patched and rebooted around this time.

[Read more…]

August IRIS Server Patching

August 8, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, August 12th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday or Wednesday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, August 13th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

Linux servers lists.eecs, iris2.eecs (for access to the network and roster databases), and login.eecs/login-mfa.eecs will be patched and rebooted Wednesday night. DNS servers cronus, themis, and rhea may also be briefly unavailable while rebooting at approximately 8:00pm Tuesday.

On Thursday, August 14th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled).

[Read more…]

July IRIS Server Patching

July 8, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, July 8th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday or Wednesday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, July 9th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

On Thursday, July 10th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled).

[Read more…]

June IRIS Server Patching

June 6, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, June 10th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday or Wednesday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, June 11th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

On Thursday, June 12th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled).

[Read more…]

May IRIS Server Patching

May 12, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, May 13th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday or Wednesday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, May 14th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

On Thursday, May 15th, the departmental DHCP server is scheduled for downtime from about 9am to 9:30am (actual downtime is expected to be shorter than scheduled).

[Read more…]

April IRIS Server Patching

April 7, 2025 by Lars Rohrbach

Microsoft will release their patches for the month on Tuesday, April 8th, 2025. Various IRIS Windows and Linux servers will be patched and rebooted Tuesday or Wednesday.

PRINT, WINTERM and WDS will automatically patch and reboot Wednesday, April 9th, at 3:00am. WINTERM may be unavailable until 10:00am Wednesday, depending on additional software updates.

On Wednesday, April 9th, the departmental DHCP server is scheduled for downtime from 10pm to 10:30pm (actual downtime is expected to be shorter than scheduled).

[Read more…]