Red Hat and Broken IPMasquerading 16
The-Pheon asks "Ok. I've read the FAQs, scoured the Linux newsgroups searching for information about ipmasqadm and I still can't get simple port forwarding to work on RedHat6. Any suggestions are greatly appreciated. The scenario:
Standard Red Hat 6.0, Kernel 2.2.12, and ipchains-1.3.8. External is ip_aliased with a legal dns addresses, Internal is a single reserved address and network, IP masquerading is configured and working for intenal -> external connections. This seems like it should be simple. To forward a simple telnet I use: /sbin/modprobe ip_masq_portfw;
/usr/sbin/ipmasqadm portfw -a -P tcp -L x.x.x.x 23 -R 192.168.1.12 23 The result: A telnet sessions to x.x.x.x (from a completely outside source) just hangs. Closer investigation shows that port forward is working -- sort of." More details are available if you hit the link.