Second time’s the charm

Sunday, December 31st, 2006 at 3:46 pm

Two months ago I failed in an attempt to switch my internet routing from Gromit, my trusty but aging linux box, to my Linksys WRT54G router. A few days ago I tried again. Unfortunately I encountered the same issues as before: difficulty establishing connections.

Then I came across a page on the DD-WRT Wiki talking about slowdown issues and how to fix them. From this page I realised that I had completely missed the display and settings related to the maximum number of IP connections. Even with Azureus sitting idle there were at least 400 connections. Considering that the default limit is 512 it is not hard to see how it may be the cause of my connection troubles.

A quick change later (maximum connections up from 512 to 4096, timeout on both TCP and UDP down from one hour to ten minutes) and all is well. So far I have been running with these settings for a day now and if I have no problems until next weekend I shall be able to disconnect Gromit and reorganise the desk, in particular the cabling.

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