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Old 07-18-2004, 07:37 PM   #1
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Registered: Jun 2004
Location: UK
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iptables and samba

hi, i ll cut to the point. i am trying to configure my linux for file sharing with win xp machines through samba. the network is through a router/firewall. from the forums i found that ports 137,138,139 must be open. i am using the following found in the forums:

$ iptables -A INPUT -s -p tcp -i eth0 --destination-port 137:139 -m state --state NEW -j ACCEPT

but it doesnt work. if i flush my iptables the win machines have access. any help?

furthermore, if i have iptables i cannot see the other win machines. if i flush the iptables again everything works fine. any solution to that one as well?


Last edited by captain-cat; 07-18-2004 at 07:49 PM.
Old 07-18-2004, 08:12 PM   #2
Registered: Jul 2004
Location: Rio de Janeiro - Brazil
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Hi Captain-cat,

Your firewall rule has just one leg. For your computer talk with your local network you need to accept rules for INPUT as you already did but must have the same rules for OUTPUT.
If your machine is not the firewall, you can run it without firewall rules. The rules must be on your firewall. I recommend you to not accept these ports from the internet. The smb protocol is very insecure and you will be subject to worm attacks. Think the firewall as the main door of your home. Whenever somebody knocks, you first look to see if is somebody you know before open the door. If you don't know the subject you may alert him you will not permit him to enter or, pretend there is nobody at home. But all the access must be across this door. Inside home, all the doors are open because who is there are relatives.
For deeper knowledge and scripts for firewall rules, see
Old 07-18-2004, 09:22 PM   #3
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You need to open those ports for TCP and UDP.


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