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08-28-2003, 06:57 AM
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#1
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Member
Registered: Aug 2003
Location: Manila, Philippines
Distribution: RH
Posts: 43
Rep:
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pls comment on my firewall
Hi,
I setup my iptables to look like this one below, I drop all incoming packet from the internet using port telnet, ftp,smtp and leave the port http,https, and ssh open. but on my lan i live all ports open and specify certain ip and netmask.
With this set of rules why i cant access HTTPS?
Is this set of rules on iptables safe now?
Chain INPUT (policy ACCEPT 240K packets, 68M bytes)
pkts bytes target prot opt in out source destination
1 60 ACCEPT tcp -- any any anywhere anywhere tcp dpt:https
2 100 ACCEPT tcp -- any any anywhere anywhere tcp dpt:http
0 0 ACCEPT tcp -- eth1 any anywhere anywhere tcp dpt:ssh
0 0 ACCEPT tcp -- eth1 any anywhere anywhere tcp dpt:telnet
0 0 ACCEPT tcp -- eth1 any anywhere anywhere tcp dpt:ftp
1 40 DROP tcp -- eth0 any anywhere anywhere tcp dpt:telnet
11 1674 ACCEPT tcp -- eth0 any anywhere anywhere tcp dpt:ssh
0 0 DROP tcp -- eth0 any anywhere anywhere tcp dpt:smtp
3 144 DROP tcp -- eth0 any anywhere anywhere tcp dpt:ftp
Chain FORWARD (policy DROP 0 packets, 0 bytes)
pkts bytes target prot opt in out source destination
0 0 ACCEPT tcp -- eth0 any anywhere anywhere tcp dpt:http
0 0 ACCEPT tcp -- eth0 any anywhere anywhere tcp dpt:https
0 0 ACCEPT tcp -- eth1 any 130.1.0.0/16 anywhere tcp dpt:ssh
0 0 ACCEPT tcp -- eth1 any 130.1.0.0/16 anywhere tcp dpt:telnet
0 0 DROP tcp -- eth0 any anywhere anywhere tcp dpt:telnet
0 0 DROP tcp -- eth0 any anywhere anywhere tcp dpt:ssh
0 0 DROP tcp -- eth0 any anywhere anywhere tcp dpt:ftp
0 0 DROP tcp -- eth0 any anywhere anywhere tcp dpt:smtp
Chain OUTPUT (policy ACCEPT 20618 packets, 1312K bytes)
pkts bytes target prot opt in out source destination
[root@localhost root]# Chain INPUT (policy ACCEPT 240K packets, 68M bytes)
Pls. comment with my setup
Thanks...
Mike
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08-29-2003, 10:49 AM
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#2
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Member
Registered: Jul 2001
Location: Earth
Posts: 164
Rep:
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Looks to me like you are still using ipchains....
Look here
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08-29-2003, 12:49 PM
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#3
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Member
Registered: Jan 2003
Location: 127.0.0.1
Distribution: Fedora&Gentoo
Posts: 207
Rep:
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Lets see the actual script.....all that stuff is jibber jabber to me
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08-29-2003, 02:03 PM
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#4
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LQ Newbie
Registered: Jun 2001
Location: San Jose, CA
Distribution: Debian (Servers); Gentoo (Desktop)
Posts: 29
Rep:
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A better idea might be to set your default INPUT policy to DROP.
This will drop all INPUT by default, and only allow in what you want.
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09-03-2003, 05:46 AM
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#5
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Moderator
Registered: May 2001
Posts: 29,415
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A better idea might be to set your default INPUT policy to DROP.
This will drop all INPUT by default, and only allow in what you want.
Excellent comment. Btw, there's nothing wrong with using ipchains if you don't need iptables functionality...
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09-05-2003, 05:14 AM
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#6
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Senior Member
Registered: Aug 2002
Location: Stuttgart (Germany)
Distribution: Debian/GNU Linux
Posts: 1,467
Rep:
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Search the forum if you want a iptables script which I think of as secure and which works fine by now ...
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