Author Archives: George Ross

Recently-completed network security projects

Last year I wrote about a couple of network security projects which were in their early stages of development.  As the last of these has recently completed, I thought it might be useful to summarise their outcomes. We have had … Continue reading

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OpenVPN changes

As described in my November posting, we’re making some changes to our OpenVPN configuration, partly to support new devices, partly to add capacity, and partly because one of the features we currently use is being phased out. The server-end changes … Continue reading

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Networking in the Forum meeting rooms

When the Forum meeting rooms were set up, we configured the wired network in them to use the “office self-managed DHCP” subnet.  This seemed appropriate at the time, as most users were expected to be Forum occupants.  The ground-floor meeting … Continue reading

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OpenVPN changes

It’s now over ten years since we first set up our OpenVPN service, and things have moved on quite a bit since then.  So far we have managed to maintain compatibility for existing users of the service, but we would … Continue reading

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Forum network stability

Following the changes noted in my recent article, the Forum network appears to have been stable again.  If you’re still experiencing problems, please report them through the support form in the usual way and we’ll look into them. As a … Continue reading

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Recent Forum network instability

You may have noticed some periods of instability with our Forum network recently.  This has proved hard to diagnose as one of the first things to be hit would be the management interfaces to our network switches, so that obtaining … Continue reading

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Network upgrades

As part of our rolling programme of network upgrades and replacement of old kit, the following have either happened or are planned to happen soon: The remaining “gigabit” switches in the Forum will be replaced with current models, completing the … Continue reading

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Scanning for vulnerable systems

This article describes a couple of security enhancements which the Computing Team will be developing over the next few months. As I mentioned  last time, we have recently started scanning all our externally-visible machines for security vulnerabilities using the JANET … Continue reading

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Self-managed machines, particularly with firewall holes

Users of self-managed machines are reminded that School policy requires that they should make all reasonable efforts to secure those machines.  This applies particularly to those which have firewall holes. Machines must be running a current OS version, and patching … Continue reading

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Temporary wireless network reconfiguration on Forum upper floors

To aid with a research project by ICSA’s Wireless & Mobile Networking (WiMo) Group, we have asked IS to reconfigure the wireless access points for the top three floors of the Forum temporarily.  For the month of September the 802.11a … Continue reading

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