Since few months I have 10/1Mbps network connection (downlink/uplink). Recently it was downgraded to 1/1Mbps and I had no idea why. Finally it appeared that my router was the problem…
Exact reason was QoS which I enabled few days ago. It looks like DD-WRT which I use now can not handle it on WRT54GS without degrading network speed. For now I disabled this but it is not an option because I plan to use VoIP more in next months so I need warranty that it will get all bandwidth it needs never mind what else would be running.
Current plans are to make use of Alix 1.c which I have from PC Engines. Soon I will have nice case for it so the only things to buy will be miniPCI WiFi card (friends suggested getting one of Atheros based ones) and 1GbE network card. I already have 2GB CompactFlash for rootfs and spare 2.5″ hdd which will be used for storage.
This configuration should be fast enough to have more functions then just router/AP. I plan to make it also printer/scanner server and probably there will be some more to add.