Hi, Try do this (with kernel 2.4 and iptables):
#echo 1 > /proc/sys/net/ipv4/ip_forward ps: you can install woody with kernel 2.4 using the option "bf24" in the boot manager of the instalation CD. Fernando Andrade Em Qua, 2005-01-05 �s 05:58, Pierre A. Damas escreveu: > Hello, > > I am fairly new to debian and firewalls, although I can read documentation > ;-) > I want to reuse an old machine to serve as firewall/proxy between two > subnets (with Windows machines) (192.168.1.0 (internal) and 192.168.254.0 > (dmz)) > > In the dmz, the router acts as additional firewall for access to my ISP > (gateway: 192.168.254.1) > > I installed my old Pentium-MMX 200 65Mb RAM, two network adapters (ne and > 8139too). > Prerequisite: I don't want to compile my kernel myself (insmod should be > sufficient), certainly not on that machine (which is my only linux). > I understood that ipfwadm is used for kernel 2.0, ipchains for 2.2 and > iptables for 2.4+. > > Since I installed the woody distribution, I am the happy owner of a kernel > 2.2. > > In that config, the network works fine (from the server, I can ping the two > subnets and access Internet). I installed squid and everything is ok. > > I would like to use ipchains, but it is "not supported in this Kernel", so I > searched everywhere to find an ipchains.o module to insmod for 2.2 (I found > for 2.4). In which package would it be ? > > ... > > As an alternative, I installed the kernel 2.4. There, iptables is correctly > configured, with ACCEPT policies by default. But in this config, the > network doesn't work. I checked with ifconfig, and ensured that eth0 and > eth1 are up (and it is the case), but I cannot ping any other machine than > the server itself on both subnets, and of course cannot access internet
