Nigel, This is exactly what I needed, thanks a lot !! >>>Patrick, > > You need to add ESTABLISHED,RELATED rules to allow responses to > connections > originating on the machine in question. > > iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT > > ESTABLISHED,RELATED allows packets which are part of an established TCP > connection i.e. the 3-way SYN-SYN/ACK-ACK has completed with no subsequent > RST. > It also allows UDP packets from a source IP/port which was a destination > within the past 30s. > > > -- > Nigel Wade, System Administrator, Space Plasma Physics Group, > University of Leicester, Leicester, LE1 7RH, UK > E-mail : nmw@xxxxxxxxxxxx > Phone : +44 (0)116 2523548, Fax : +44 (0)116 2523555 > > -- > redhat-list mailing list > unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe > https://www.redhat.com/mailman/listinfo/redhat-list > -- Web and Co Patrick Derwael Rue Hubert Larock, 20 4280 Hannut Tel/Fax: 019/63.64.35 GSM: 0479/80.50.79 email: pderwael@xxxxxxxxxxx http://www.webandco.be -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list