I'm trying to setup a bridging firewall, and after some initial problems with the modules and such the bridge is working now, and iptables are also doing just fine (and see the bridged packets).
Now here's be big prob: when doing some simple testing everything works fine (pings, telnets, connects in both directions over the bridge), but whenever trying to transfer anything with larger packets (like large websites or ftp transfers) it goes exceptionally slow (or even times out) in one direction, while going just fine in the other?? this is 100% reproducable, and when interchanging the network cables for the two bridge ports it will happen in the other direction. I've tested with one PC behind the bridge doing ftp transfers to a local server: downlowd: 6000 kb/s, and works perfectly, upload sends a couple kbytes, slows to around 1kb/s and either continues even slower or just times out and aborts.
this is on the latest stable 2.4.20 kernel fresh off kernel.org with the latest ebtables/bridge-nf patches.
I've also tried flushing the iptables completely and setting everything to allow, with no change in behaviour. the ebtables are in their default state (no entries).
Any idea on what could be causing this, or how to figure out where exactly the problem lies? Or even better, how to solve this? ;)
Any help would be greatly appreciated as I'm currently at a loss what the reason for this behaviour could be... (I've already exchanged the NICs to rule that out).
regards,
tom.
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