* what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.?
@ 2005-01-26 0:05 seberino
2005-01-26 13:29 ` Jose Maria Lopez
2005-01-26 18:47 ` Jason Opperisano
0 siblings, 2 replies; 5+ messages in thread
From: seberino @ 2005-01-26 0:05 UTC (permalink / raw)
To: netfilter
I'm only allowing TCP out of my firewall.
What apps/protocls need UDP?
DNS, IMAP, SSH, etc.?
I dunno if I need to allow UDP for anything.
chris
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.?
2005-01-26 0:05 what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.? seberino
@ 2005-01-26 13:29 ` Jose Maria Lopez
2005-01-26 13:30 ` Raphael Jacquot
2005-01-26 18:47 ` Jason Opperisano
1 sibling, 1 reply; 5+ messages in thread
From: Jose Maria Lopez @ 2005-01-26 13:29 UTC (permalink / raw)
To: netfilter
El mié, 26 de 01 de 2005 a las 01:05, seberino@spawar.navy.mil escribió:
> 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@bgsec.com
bgSEC Seguridad y Consultoria de Sistemas Informaticos
http://www.bgsec.com
ESPAÑA
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"
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.?
2005-01-26 13:29 ` Jose Maria Lopez
@ 2005-01-26 13:30 ` Raphael Jacquot
0 siblings, 0 replies; 5+ messages in thread
From: Raphael Jacquot @ 2005-01-26 13:30 UTC (permalink / raw)
To: Jose Maria Lopez, netfilter
Jose Maria Lopez wrote:
> El mié, 26 de 01 de 2005 a las 01:05, seberino@spawar.navy.mil escribió:
>
>>I'm only allowing TCP out of my firewall.
>>
>>What apps/protocls need UDP?
>>
>>DNS, IMAP, SSH, etc.?
all the mbone protocols, such as RTP and friends
> 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.
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.?
2005-01-26 0:05 what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.? seberino
2005-01-26 13:29 ` Jose Maria Lopez
@ 2005-01-26 18:47 ` Jason Opperisano
2005-01-28 17:45 ` Mohd. Jeffry
1 sibling, 1 reply; 5+ messages in thread
From: Jason Opperisano @ 2005-01-26 18:47 UTC (permalink / raw)
To: netfilter
On Tue, Jan 25, 2005 at 04:05:50PM -0800, seberino@spawar.navy.mil wrote:
> I'm only allowing TCP out of my firewall.
>
> What apps/protocls need UDP?
>
> DNS, IMAP, SSH, etc.?
DNS--yes. IMAP and SSH--no.
> I dunno if I need to allow UDP for anything.
other common UDP ports i allow out:
Port Service
---------------
123 NTP
500 IKE
-j
--
"I never passed Remedial Science 1A.
And you're a nuclear technician?"
--The Simpsons
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.?
2005-01-26 18:47 ` Jason Opperisano
@ 2005-01-28 17:45 ` Mohd. Jeffry
0 siblings, 0 replies; 5+ messages in thread
From: Mohd. Jeffry @ 2005-01-28 17:45 UTC (permalink / raw)
To: netfilter
DNS, NTP, NFS
On Wed, 26 Jan 2005 13:47:21 -0500, Jason Opperisano <opie@817west.com> wrote:
> On Tue, Jan 25, 2005 at 04:05:50PM -0800, seberino@spawar.navy.mil wrote:
> > I'm only allowing TCP out of my firewall.
> >
> > What apps/protocls need UDP?
> >
> > DNS, IMAP, SSH, etc.?
>
> DNS--yes. IMAP and SSH--no.
>
> > I dunno if I need to allow UDP for anything.
>
> other common UDP ports i allow out:
>
> Port Service
> ---------------
> 123 NTP
> 500 IKE
>
> -j
>
> --
> "I never passed Remedial Science 1A.
> And you're a nuclear technician?"
> --The Simpsons
>
>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-01-28 17:45 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-01-26 0:05 what protocols need UDP instead of just TCP?? DNS, IMAP, SSH, etc.? seberino
2005-01-26 13:29 ` Jose Maria Lopez
2005-01-26 13:30 ` Raphael Jacquot
2005-01-26 18:47 ` Jason Opperisano
2005-01-28 17:45 ` Mohd. Jeffry
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