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clerus21
Apprentice
Joined: 20 Aug 2003
Posts: 196
Location: uruguay
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 Posted: Fri Aug 18, 2006 3:32 pm Post subject: blocking an application with iptables |
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Hello, i just installed doom3  and i want to block it from accesing the internet, because i dont want it to authenticate.
i dont know what port it uses, and even if i knew i dont know how to block it 
can anyone help me pliz?
thanxz a lot
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Drunkula
Apprentice
Joined: 28 Jul 2003
Posts: 257
Location: Denton, TX - USA
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| Posted: Fri Aug 18, 2006 4:55 pm Post subject: |
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You can easily find this info on the net. Try http://www.gameconfig.co.uk/
Doom3
TCP Ports 27666, 27650
UDP Ports 27666, 27650
You'll need to setup iptables to block those specific ports. I'm sure the docs are here somehwere! 
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think4urs11
Bodhisattva
Joined: 25 Jun 2003
Posts: 6659
Location: above the cloud
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| Posted: Fri Aug 18, 2006 5:18 pm Post subject: |
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you can also drop packets depending on user/groupid or even process id. (owner match)
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Nothing is secure / Security is always a trade-off with usability / Do not assume anything / Trust no-one, nothing / Paranoia is your friend / Think for yourself |
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clerus21
Apprentice
Joined: 20 Aug 2003
Posts: 196
Location: uruguay
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| Posted: Fri Aug 18, 2006 5:20 pm Post subject: |
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It didnt work
i did this:
| Code: |
iptables -A INPUT -p udp --destination-port 27650 -j DROP
iptables -A INPUT -p udp --destination-port 27666 -j DROP
iptables -A INPUT -p tcp --destination-port 27650 -j DROP
iptables -A INPUT -p tcp --destination-port 27666 -j DROP
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any idea why it didnt work?
thanxz
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TAMMUZ
MSI RS482 M4
AMD X2 3800+
Nvidia 8800GT 512mb (MSI)
2 GB Ram Dual-Channel
300 GB Seagate Sata II |
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xglad
n00b
Joined: 13 Aug 2002
Posts: 53
Location: Ft. Lauderdale, FL, USA.
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| Posted: Fri Aug 18, 2006 6:22 pm Post subject: |
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| If you want to block outgoing traffic, use the OUTPUT chain. |
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expat_iain
Guru
Joined: 09 Jan 2004
Posts: 361
Location: Malta GC
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| Posted: Fri Aug 18, 2006 10:02 pm Post subject: |
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| xglad wrote: | | If you want to block outgoing traffic, use the OUTPUT chain. |
If you are blocking the *firewall* from accessing this service, else use the FORWARD chain if the firewall is inline.
Regs.
Iain. |
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