This post is probably not much interest to many people but it might help some if, like me, you’re trying to re-configure a Technicolor TG582n ADSL router from Plusnet. Just make sure you read all the way to the end and save yourself some time!

For the last 11 years, my ADSL connection has been running with an elderly Solwise SAR110 ADSL modem/router, provided by Plusnet when we first connected to 512Mbps ADSL. Those were the days – half a meg download speeds seemed so fast back then! Whilst fibre has (just about) reached my neck of the woods, my ADSL 2 connection is working well, most of the time, and I get about 6Mbps down and 0.7Mbps up these days. Indeed, the connection actually seems to have become more responsive lately (my theory is that the contention rate has dropped in line with people switching to fibre)!  I did have cause to call Plusnet for support last week though, and they agreed to ship me a new router if I signed up to one of their current packages (which, incidentally saved me money too as we were still on a very old tariff).

The new router is a Technicolor TG582n and I finally got around to setting it up tonight. I was told that I might get slightly faster speeds but there’s no evidence of that based on the tests I’ve run so far (that may change in a couple of days when we roll into a new billing month and onto the new service) [Update: after a few reboots my speed has doubled to around 12Mbps]. For now though I just want to swap the old router out for the new one.

The first thing I found was that the default configuration sets the router’s IP address to 192.168.1.254. That’s the IP address of my wireless access point, and all of my devices are expecting a gateway address of 192.168.1.1.  So, I downloaded the router configuration (Technicolor Gateway -> Configuration -> Save or Restore Configuration).  This gave me a file called user.ini, which I then searched for all instances of 254 and looked like they were part of an IP address (ignoring one which was part of a long string of numbers) and replaced 254 with 1.  I then uploaded the new configuration and, hey presto, the browser refreshed giving me back the config for my wireless access point on 192.168.1.254 and the router was responding on 192.168.1.1.  That seems a bit of a kludge and there should be another way to do this, but I couldn’t find it in the GUI (at least not with software release 10.2.2.B).

Then, reading around I found that the router also has a DHCP server enabled by default. I don’t want that right now (my Raspberry Pi is doing that job for me) so I started to investigate switching that feature off. Again, I couldn’t find it in the GUI, so I tracked down a copy of the CLI guide for the router (from another ISP – Demon – albeit for an older release) and, sure enough, after telnetting onto the box the dhcp server config command told me it was enabled so I corrected that with the following commands:

dhcp server config state=disabled
saveall

After all that, I found the config that I needed – it seems that the location to make the changes is Home Network -> Interfaces -> Local Network -> Configure.

There I found some handy checkboxes to turn on/off DHCP servers (IPv4 and IPv6) as well as the static address for IPv4 addresses!

After all this, I may well switch over to one of the popular open source firmware packages on the router… but I’ll leave it alone for now…