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Thread: Help with IPTABLES

  1. #1

    Help with IPTABLES

    Hi I need help :-)
    my pc(running vista) is behind WL500gP which runs firewall(ip tables)

    the post firewall script looks like this:
    #block everything
    iptables -I FORWARD 1 -j DROP
    #routing for established connections
    iptables -I FORWARD 1 -m state --state ESTABLISHED,RELATED -j ACCEPT

    #DNS allowed
    iptables -I FORWARD 1 -p tcp --dport 53 -j ACCEPT
    iptables -I FORWARD 1 -p udp --dport 53 -j ACCEPT
    # ping allowed
    iptables -I FORWARD 1 -p icmp -j ACCEPT

    #www alloved
    iptables -I FORWARD 1 -p tcp --dport 80 -j ACCEPT
    iptables -I FORWARD 1 -p tcp --dport 8080 -j ACCEPT
    iptables -I FORWARD 1 -p tcp --dport 443 -j ACCEPT

    and some other ports like pop, imap ...

    The problem is that i cant open some web pages for example (i cant update my vista) and some more.
    most of the others pages are working fine.
    I can ping the page and the name is resolved to ip adress but i cant open it in browser (opera,ie) if i open this page in Lynx -installed on asus- the page can be shoven.

    I think the problem is in some other port which must be open but dunno which one. If i open microsoft page throught its working fine.

    Any advice? I have been googling all week but now im lost :-(

  2. #2
    Try to make MTU value smaller for your WAN connection. Or make MTU smaller on your pc. Search Google - how to do it on Vista.

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