Category Archives: Local IT systems

Sys-admin news

DNSSEC for cl.cam.ac.uk

DNSSEC will be enabled 2013/11/18 for cl.cam.ac.uk Continue reading

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Filer running slowly

The filer is running slowly at the moment. This is because we’re copying the entire filesystem to the replacement machine. The ultimate goal is to make everything faster, but in the short term we have to suffer some pain.

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Purge of legacy automount information

It is believed that the last systems using the old “indirect” autofs LDAP tables have been shut down or moved to use “direct” filer mounts, so the information is no longer included in the LDAP data. If anyone observes failure … Continue reading

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Xen Server problems – please report anomalies

We have had a number of problems with one of our Xen pools. If any VMs appear to be behaving oddly, please contact sys-admin.

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CentOS5 (Linux server) network service problems.

A Redhat package problem caused CentOS 5 machines (Linux Servers) to loose access to certain network services. One of our two mail servers may have rejected email between 04:15 and 04:30, when the problem was spotted and the failing MTA … Continue reading

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DNS resolvers now validating

The CL DNS resolvers have DNSSEC validation enabled. Please report any DNS problems to sys-admin.

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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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