* Wietse Venema <[email protected]>: > We have een reports on this mailing list that some routers or > firewalls mis-handle TCP features such as window scaling and ECN. > > Of course it is possible that the problem is not with your > nearest router, but elsewhere in the network. > > > Any workaround? > > Disable TCP window scaling in the kernel. > > *BSD: sysctl -w net.inet.tcp.rfc1323=0 > LInux: sysctl -w net.ipv4.tcp_window_scaling=0 > > Append the corresponding name=value setting to /etc/sysctl.conf > to make this setting active on each reboot.
As is to be excpected this mailing list has seen it's fair share of problems related to operating systems, routers, firewall appliances and the like. Aside from the things you mention above, DKIM signatures being blocked by ASAs and a lot of PIX workarounds come to my mind. Do people on this list feel that it might be a good idea to compile a list of these common interoperability problems with their solutions (workarounds) and make this document publicly available, perhaps even within the official documentation? I'd volunteer to draft such a document, but since neither my English nor my knowledge about network devices and commercial content filtering applications is sufficient for such a task, it could only be a draft. Stefan
