Hi, For anyone interested, I was attempting to set up a load balancing FTP server, which I've done before. I had a brand new kernel, installed the nfct patches, etc. Not knowing that there had been a tcp-window-tracking patch to the kernel, I couldn't figure out why the first passive connection would always work, but later passive connections would fail. After poking around, I could see the (*pskb)->nfct pointer was NULL, and I was completely stumped. Thanks to Pascal Hambourg's post, I tried echo 1 > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_be_liberal and magically, everything works perfectly, just like the old server. I hope this helps others who are load balancing ftp servers. Thanks to everyone who contributes to Open Source and these mailing lists!!! Mike Polek Pictage, Inc.
