No net-based service accessible
 

On my newly installed RH9 no net-based service (HTTP, Samba, telnet, http) is accessable from another machine. Though services look running and there is ping no service answers to an external request. What I didn't turn on or what I forgot to configure?

you forgot to disable iptables/security level. If you disable iptables you machine should be visible again. you have 2 alternatives: disable them and have your machine wide open, which is not as bad as it sounds, or find a good guide for them if you want more info on how to configure iptables properly. Also note that to actually connect to your machine via ssh, you have to have sshd running.

The obvious thing to look at would be the firewall. Try '/sbin/iptables -L' to see what filters are configured. You can turn off the firewall with '/sbin/service iptables stop'. When you installed RH, did you enable the firewall? If so, did you allow SSH, FTP, HTTP, etc. connections?

thanks guys! Right guess. It's the firewall. Thx for the quick answer:-)