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05-16-2004, 09:27 PM
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#1
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LQ Newbie
Registered: May 2004
Posts: 2
Rep: 
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Rules before DNAT
I have setup the firewall to run DNAT from internet to a server in DMZ for HTTP and SMTP,
Is it possible to block some source ips before it cann dnat to my the sever in dmz? I found that after i run the dnat rules, the rule ( iptables - I INPUT -i eth0 -s abc.xxxx.xxx.zzz -j DROP) cannot block the access from abc.xxx.xxx.zzz to my email server.
Regards
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05-17-2004, 03:41 AM
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#2
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Senior Member
Registered: Mar 2003
Location: Beautiful BC
Distribution: RedHat & clones, Slackware, SuSE, OpenBSD
Posts: 1,791
Rep: 
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You can
#iptables -t nat -A PREROUTING -s <source ip> -j DROP
to keep unwanted visitors out of your net.
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05-17-2004, 10:16 PM
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#3
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LQ Newbie
Registered: May 2004
Posts: 2
Original Poster
Rep:
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Thanks. Problem solved.
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