I updated my firewall script [only for a usually home desktop pc, Fedora 14] 1) Does this really gives protection against syn attacks?: http://www.webhostingtalk.com/showpost.php?s=9bc3d4f0da424f10c6ad08f572d3ebf0&p=2784813&postcount=1 2) how can i flush all the iptables rule/policy to default? this is the offical method? [are there unnecessary lines in it?] : # FLUSH ALL RULES $IPTABLES -F $IPTABLES -t nat -F $IPTABLES -t mangle -F # ERASE ALL NON-DEFAULT CHAINS $IPTABLES -X 3) are there any docs/howtos, [like the syn attack "1)" one], that could give me more "security" with iptables? 4) my firewall script is here [are there any errors in it?]: http://pastebin.com/raw.php?i=R7QdiDd9 5) is there a command to get info, that how many packets went through e.g.: the $IPTABLES -A OUTPUT -p tcp --dport 20:21 -j ACCEPT or the $IPTABLES -A OUTPUT -p tcp -m multiport --dport 80,443 -j ACCEPT line? are there any statistics about it? ps.: the local dns server was just a: yum -y install caching-nameserver chkconfig --level 5 named on ps2.: and i found out, that if i use a local dns server, that local dns server will "get info" from the root servers!!! no more relying on google dns, or opendns!! hurraj! :) !!! made my day :) ps3.: i found out why my computer hangs, after installing the cached name server: http://lists.fedoraproject.org/pipermail/users/2010-December/388752.html it was regarding the firewall.... but with my newest [ 4) ] firewall script, it works just fine |
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