Re: what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.?

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El miÃ, 26 de 01 de 2005 a las 01:05, seberino@xxxxxxxxxxxxxxx escribiÃ:
> I'm only allowing TCP out of my firewall.
> 
> What apps/protocls need UDP?
> 
> DNS, IMAP, SSH, etc.?

DNS needs UDP for sure.

> 
> I dunno if I need to allow UDP for anything.

Just for DNS if you don't have more protocols like NFS or the
like that use the UDP.

Make a lsof -i and look at the daemons you have and if they
are listening to UDP or TCP ports, or consult the /etc/services
list to know if your services need UDP or not.

> chris

Regards.

-- 
Jose Maria Lopez Hernandez
Director Tecnico de bgSEC
jkerouac@xxxxxxxxx
bgSEC Seguridad y Consultoria de Sistemas Informaticos
http://www.bgsec.com
ESPAÃA

The only people for me are the mad ones -- the ones who are mad to live,
mad to talk, mad to be saved, desirous of everything at the same time,
the ones who never yawn or say a commonplace thing, but burn, burn, burn
like fabulous yellow Roman candles.
                -- Jack Kerouac, "On the Road"




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