Netfilter 0.1.9 for Linux 2.3.18: Packet Mangling for Linux 2.3. New features: Should work with gcc 2.7.x (no more ‘memset undefined’), local NFS and conntrack should work fine, speed should be fine for modems, ‘Call rusty: need skb_realloc_tailroom!’ for ftp cured, tcp and udp ports printed correctly in iptables, should compile on libc5 for SURE this time. (Official Site).
You can download it from the following link: https://packetstormsecurity.com/files/download/16069/netfilter-0.1.9.tar.bz2
Source: https://packetstormsecurity.com/files/16069/netfilter-0.1.9.tar.bz2.html