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Full Discussion: "Stealth up" port 80
Special Forums Cybersecurity "Stealth up" port 80 Post 302444440 by wiluni on Thursday 12th of August 2010 12:30:33 AM
Old 08-12-2010
"Stealth up" port 80

ipables - stealth port 80

This is how I did set up my iptables. It's basic, easy and simple, but it suits my needs.

Code:
    iptables -A INPUT -i lo -j ACCEPT
    iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
    iptables -A INPUT -p tcp --dport 80 -j ACCEPT
    iptables -A INPUT -j DROP

What I'm not happy yet is about port 80. At the "stealth up" test, it is shown as closed. I would rather prefer it to be stealth. i know most people advocate that closed or stealth, is equally secure. I wouldn't argue that. It's just because, if there's no difference, then my preference is to have it shown stealth.

Now, I'm quite new to Linux and don't have a clue about getting that change done. I tried to search for a solution here in the forums, but got a 4 page results.... and also tried earlier to google it, with no success.

Any help would be much appreciated.

Last edited by pludi; 08-12-2010 at 02:13 AM.. Reason: code tags, please...
This User Gave Thanks to wiluni For This Post:
 

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IPTABLES-XML(8) 														   IPTABLES-XML(8)

NAME
iptables-xml -- Convert iptables-save format to XML SYNOPSIS
iptables-xml [-c] [-v] DESCRIPTION
iptables-xml is used to convert the output of iptables-save into an easily manipulatable XML format to STDOUT. Use I/O-redirection pro- vided by your shell to write to a file. -c, --combine combine consecutive rules with the same matches but different targets. iptables does not currently support more than one target per match, so this simulates that by collecting the targets from consecutive iptables rules into one action tag, but only when the rule matches are identical. Terminating actions like RETURN, DROP, ACCEPT and QUEUE are not combined with subsequent targets. -v, --verbose Output xml comments containing the iptables line from which the XML is derived iptables-xml does a mechanistic conversion to a very expressive xml format; the only semantic considerations are for -g and -j targets in order to discriminate between <call> <goto> and <nane-of-target> as it helps xml processing scripts if they can tell the difference between a target like SNAT and another chain. Some sample output is: <iptables-rules> <table name="mangle"> <chain name="PREROUTING" policy="ACCEPT" packet-count="63436" byte-count="7137573"> <rule> <conditions> <match> <p>tcp</p> </match> <tcp> <sport>8443</sport> </tcp> </conditions> <actions> <call> <check_ip/> </call> <ACCEPT/> </actions> </rule> </chain> </table> </iptables-rules> Conversion from XML to iptables-save format may be done using the iptables.xslt script and xsltproc, or a custom program using libxsltproc or similar; in this fashion: xsltproc iptables.xslt my-iptables.xml | iptables-restore BUGS
None known as of iptables-1.3.7 release AUTHOR
Sam Liddicott <azez@ufomechanic.net> SEE ALSO
iptables-save(8), iptables-restore(8), iptables(8) Jul 16, 2007 IPTABLES-XML(8)
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