Author Archives: maj1

CL VPN certificate replacement

The SSL certificate used to authenticate the CL-specific instance of the UIS VPN service at vpn.cl.cam.ac.uk is scheduled for routine replacement on Tuesday 13th February at about 08:00. The purpose of this certificate is to give the VPN client the … Continue reading

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Filer software update Tuesday 9th Jan 2018

The next scheduled vulnerable period (2018-01-09 0700-1000) will be used to perform a software update on the NetApp filers elmer and eldo. Elmer is the main filer directly visible to users and eldo provides the backing store for virtual machines. … Continue reading

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NFS version 4

Support for NFS version 4 has now been enabled on the main NetApp filer “elmer”. The change is upwards compatible in the sense that the older protocol remains available as well. However client systems which support multiple versions will normally … Continue reading

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Wireless outage

The report I have received from the UIS about today’s wireless outage is slightly inconclusive. It seems that there was a malfunction of the central controller that looks after our access points, causing them to reboot and go into a … Continue reading

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Remote backups resumed

The regular remote backups that were suspended on 30th January have now resumed. In particular home directories are now up to date on the remote server and should continue to be backed up hourly. Some snapshots with non-standard names will … Continue reading

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IPv6 address changes

There has recently been a change to the IPv6 address allocations used in the University, though at present this affects relatively few people. The reason for the change is that the original allocation to Cambridge was not thought to be … Continue reading

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Problem with remote backups

Since the morning of Monday 30th January, we have had a problem with the offsite backup system; a number of filesystems, including the one containing user home directories, are not being copied to the offsite server. The problem began when … Continue reading

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Network problem 2011-11-25

There was a major problem with the CL internal network during the afternoon of Friday 25th November, believed to have been caused by a faulty switch. There were a number of consequential side effects on other systems, which we now … Continue reading

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Wireless network replacement – phase 2 complete

Phase 2 of the wireless network replacement is now complete, adding a number of mid-corridor access points. No further expansion is currently planned. Filling in any remaining dead spots should be technically straightforward, but will incur an additional cost.

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Phone outage Thursday 28th July

The Computing Service send their apologies for the telephone system outage this morning. A small and fairly routine reconfiguration was made to the West Cambridge routers during this morning’s CUDN vulnerable period, ironically with the ultimate goal of improving network … Continue reading

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