Slansky Lukas wrote:
>
> Hello,
>
> we’re using PG and Application Server (JBoss) on separate CentOS
> servers with Cisco PIX in between. On DB side is iptable with
> following relevant rules:
>
> 1. -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
>
> 2. -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp -s
> aaa.bbb.ccc.ddd --dport 5432 -j ACCEPT
>
> 3. -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited
>
> I was wondering when these rules are not OK for our environment. It
> seems that rules 1 and 2 sometimes pass packets and therefore these
> packets are rejected. Such connection is then in some weird state,
> doesn’t communicate (obviously – packets are dropped) and psql (or
> JBoss) connection is blocking for a long time (at least few hours).
>
> Everything seems to be OK when I have changed rule 2 to “-A
> RH-Firewall-1-INPUT -m tcp -p tcp -s aaa.bbb.ccc.ddd --dport 5432 -j
> ACCEPT“.
>
> I’m really confused – what other states are possible for iptables
> except ESTABLISHED, RELATED or NEW? In iptables manpage is only
> INVALID, but why is this state emerging?
>
this is a linix iptables question, not a postgres question.