How to generate graphs with gnuplot

Posted on 2 September 2011 by Guy Morrell

Introduction During the JANET Carrrier Ethernet Trial we we took part in, I needed to plot some data based on our testing and came across gnuplot. It is actually quite simple to use and we’re doing so more and more … Continue reading →

Posted in Documentation, Productivity, Trend Analysis, Wireless | 1 Comment

Maintenance Work On Eduroam

Posted on 1 September 2011 by Guy Edwards

Just a slightly uneventful blog post aimed at our IT staff in colleges, departments and other units to let you know about some of the grittier routine work on Eduroam. This is a warts and all account of real life … Continue reading →

Posted in General Maintenance, Wireless | Leave a comment

BBC iPlayer and the University VPN

Posted on 4 January 2011 by Guy Edwards

[edit] Since writing this an iPlayer developer has passed on via informal channels that they’re using the Quova geolocation service. In this database part of our VPN address range was designated an ‘international proxy’ – while this may be regarded … Continue reading →

Posted in General Maintenance, VPN, Wireless | Leave a comment

Visitor Network Account Management (enhancements update)

Posted on 14 July 2010 by Oliver Gorwits

Note: this post relates to a private service for University of Oxford IT Support Staff. Some time back I published a list of proposed updates to the Visitor Network account management web tool, and asked for feedback. Based on that … Continue reading →

Posted in Services, Wireless | Leave a comment

OWL and Eduroam

Posted on 13 July 2010 by Guy Edwards

There seems to be a little confusion out there about how OWL relates to Eduroam so this is a overview to help clarify the situation. We have deployed Eduroam using WPA enterprise. Briefly from the users perspective this means that … Continue reading →

Posted in Services, Wireless | Leave a comment

Visitor Network account lifetime

Posted on 22 February 2010 by Oliver Gorwits

Several comments on my recent post about updates to the Visitor Network Account Management tool requested an increase of the maximum account lifetime. Whilst this is more of a policy change than a feature update to the tool, and hence … Continue reading →

Posted in Documentation, Services, Wireless | Leave a comment

Updates to the Visitor Network Account Management Tool

Posted on 15 February 2010 by Oliver Gorwits

Note: this post relates to a private service for University of Oxford IT Support Staff. It’s been some time since the Visitor Network account management tool, which you use to create network access accounts for visitors to the University, has … Continue reading →

Posted in General Maintenance, Services, Wireless | 1 Comment

Logging from iptables

Posted on 11 February 2010 by Oliver Gorwits

We recently had a problem to troubleshoot on the wireless network, which was quickly resolved through simply having effective logging from iptables. In case you didn’t know, iptables has a LOG target which can direct messages to the local syslog … Continue reading →

Posted in Best Practices, Firewall, Wireless | Leave a comment

Wireless – what could possibly go wrong?!

Posted on 1 February 2010 by Oliver Gorwits

I love this slide from a Troubleshooting Wireless Networks talk I attended last week. It says a lot about how difficult it is to tackle trouble tickets of the “client can’t connect to network” variety.

Posted in Cisco Networks, Wireless | Leave a comment

Fixing the iPhone OS WiFi auto-login problem

Posted on 12 October 2009 by Oliver Gorwits

Some time ago, shortly after iPhone OS 3.0 was released, we received a number of reports from users that our VPN-based wireless service had become unusable. For those not familiar with this service, OWL is one of our local wireless … Continue reading →

Posted in VPN, Wireless | Leave a comment