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On 12/16/11 22:17, Tanstaafl wrote: |
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> Hi all, |
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> |
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> I was reading up on some iptables rules in the gentoo security handbook: |
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> |
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> http://www.gentoo.org/doc/en/security/security-handbook.xml?part=1&chap=12&style=printable |
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> |
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> |
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> It mentions DROPing packets with an INVALID state. |
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> |
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> It sounded/sounds like a good idea, so I added the following rule: |
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> |
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> -A INPUT -i eth0 -m state --state INVALID -j LOG |
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> |
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> As suggested, I addd this rule just ABOVE this one: |
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> |
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> -A INPUT -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT |
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> |
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> I also changed the DROP action to LOG so I could see what it did if |
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> anything. |
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> |
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> Right after adding this rule, I started seeing lines like this in the |
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> log: |
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> |
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> Dec 16 10:15:31 myhost kernel: IN=eth0 OUT= |
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> MAC=00:e0:81:54:9c:8a:00:90:7f:86:a8:c0:08:00 SRC=208.87.137.233 |
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> DST=192.168.1.252 LEN=40 TOS=0x00 PREC=0x00 TTL=52 ID=0 DF PROTO=TCP |
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> SPT=50113 DPT=25 WINDOW=0 RES=0x00 RST URGP=0 |
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> |
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> What I don't understand is why it isn't using my LOG prefix that is |
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> used for everything else: |
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> |
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> -A INPUT -j LOG --log-prefix "(>fw-drop): " --log-level 7 |
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> |
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> Anyone? |
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> |
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Did you put the log-prefix rule before or after the LOG rule? |
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Or why didn't you put it in a 1liner, say: |
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|
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-A INPUT -i eth0 -m state --state INVALID -j LOG --log-level 7 |
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--log-prefix "(>fw-drop): " --log-ip-options --log-tcp-options |
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|
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-- |
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Regards, |
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