On Sun, 2004-11-28 at 19:06 -0600, Randy wrote: > Hello, > I've been noticing something VERY strange with my d-link firewall and > FC3. Whenever I reboot an FC3 server, about 30 seconds to one minute after > the server has come to the 'log on' screen, the firewall begins to send out > massive amounts of broadcasts to my entire home network, bringing > everything to a standstill. The firewall floods my entire 100Mbps network > with enough broadcast traffic that almost no packets can get anywhere. > > This is a standard FC3 install to an empty disc, not an upgrade. > > The firewall is a d-link di-804hv with firmware version 1.4 (the most > recent). VPN services are turned off (VPN passthru is on). universal plug > & play is turned off. The firewall has a fixed address on the internal > network. It doesn't need to access any internal servers for anything. > > Has anyone seen anything like this? The first time it happened, I > thought someone had hacked my firewall, so I re-flashed it and > re-configured it. But now I've noticed that EVERY time I reboot an FC3 > server, I can expect this to happen. > > Randy It could be that your router is buggy. Is ecn enabled? From the terminal try: $ cat /proc/sys/net/ipv4/tcp_ecn If this returns 1, try turning it off with: # echo 0 > /proc/sys/net/ipv4/tcp_ecn I *think* that's only temporary. If that doesn't survive a reboot. edit /etc/sysctl.conf and add the line net.ipv4.tcp_ecn = 0 and run # sysctl -p Wayne Steenburg
