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Meta
I just received a spam email from my own address
Our team was asked to answer some queries about how it’s possible to receive mail that has been forged as being from your email address. This article slightly overlaps with a previous article in 2011 that covered similar ground. Please note … Continue reading
Posted in Mail Relay
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NTP service changes Nov 2012
Over the next month we’ll be doing some work to consolidate our NTP stratum 2 and 3 services into what will hopefully (subject to antenna installation) be a four system stratum 1 service. All historical IP addresses and DNS names … Continue reading
Posted in Best Practices, General Maintenance, NTP
1 Comment
Using Microsoft Active Directory as the Authentication server for an SSL VPN on a Cisco ASA.
Background We wanted to be able to run an SSL VPN for a second team (Team B) on one of our ASA pairs. It was important to give each team a different VPN pool for security reasons. The first team … Continue reading
Posted in Cisco Networks, VPN
Tagged asa 'active directory' cisco vpn
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Disabling 802.11b
We have been pondering the idea of disabling 802.11b for some time. Research into the subject has proved that it will be feasible. What’s the difference? 802.11b was the first standard of wireless networking conceived by IEEE in 1999. It’s … Continue reading
Posted in Wireless
4 Comments
Eduroam capping
There has been a lot of discussion recently about capping eduroam on ITSS-D. I’d like to take the opportunity to present the state of the centrally managed wireless network, but also to provide some rationale behind this decision, which was … Continue reading
Posted in Wireless
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ASA 5505 Transparent Mode DHCP and Memory fun
We have a customer who uses a Cisco ASA 5505 in transparent mode to protect a small LAN. They did the right thing and took out SmartNet cover, but the reseller botched something and the TAC wouldn’t play with them … Continue reading
Posted in Best Practices, Cisco Networks, DHCP, Firewall, General Maintenance
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Eduroam connectivity issues on Android 2.3.*
Since reports from users are on the increase, this blog post describes briefly the issue with eduroam connectivity on Android devices. Please be aware of it and inform your users, should they ask for advice. The problem is affecting some … Continue reading
Posted in Wireless
9 Comments
VPN NAT Changes
What is this post about? We are planning to make a minor change to the way our VPNs NAT clients. For those who are interested, this blog post explains why and how we are doing this. Please note that these … Continue reading
Posted in Cisco Networks, Documentation, General Maintenance, VPN
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How to generate graphs with gnuplot
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
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
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