Without iptables, I have access to port 80, using the ppp0 (P-t-P) device.
With iptables, I can’t get it to work.
Bug: yast2 only shows the actual network interfaces, not any other added virtual devices.
Bug: Also, custom firewall rules (added in yast2) don’t work at all in OpenSuse 12.3. I think there are already threads about this.
Each time I open a P-t-P connection, iptables is reloaded.
Each time I try to add a custom firewall rule by hand. For example:
iptables -A input_ext -i ppp0 -p tcp --dport 80 -j ACCEPT
input_ext because that’s where yast2 currently also puts the port 22 rule. But ppp0 probably is currently not configured, in any ‘zone’ at all.
It shows up in ‘iptables -nL’ but nothing gets through. Without iptables everything works.
Howdo I inform iptables (or yast2) about added ppp devices? What else can I try?