Without firewall, I have a working vpn on ppp0 interface.
Then I set firewall up:
# iptables -S
-P INPUT DROP
-P FORWARD DROP
-P OUTPUT DROP
-A INPUT -i lo -j ACCEPT
-A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A OUTPUT -m conntrack --ctstate NEW,RELATED,ESTABLISHED -j ACCEPT
But vpn doesn't work as ppp0 drops down.
What firewall rules should be for ppp0 in this case?
