* Re: What ports need to be open to allow for mail?
2003-04-10 9:39 What ports need to be open to allow for mail? James Marcinek
@ 2003-04-10 10:18 ` Raymond Leach
2003-04-10 10:24 ` Rasmus Reinholdt Nielsen
` (3 subsequent siblings)
4 siblings, 0 replies; 7+ messages in thread
From: Raymond Leach @ 2003-04-10 10:18 UTC (permalink / raw)
To: Netfilter Mailing List
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Hi
Depends what kind of mail:
SMTP uses tcp port 25 (no UDP necessary)
POP3 uses tcp port 110 (no UDP necessary)
HTH
Ray
On Thu, 2003-04-10 at 11:39, James Marcinek wrote:
> Hello All,
>
> I'm trying to set up my mail server; however I want to
> make sure that I have the correct port(s) open. I
> already have TCP port 25 open; however do I also have
> to have UDP port 25 open as well? Any help would be
> appreciated.
>
> Thanks,
> James
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Tax Center - File online, calculators, forms, and more
> http://tax.yahoo.com
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^ permalink raw reply [flat|nested] 7+ messages in thread* Re: What ports need to be open to allow for mail?
2003-04-10 9:39 What ports need to be open to allow for mail? James Marcinek
2003-04-10 10:18 ` Raymond Leach
@ 2003-04-10 10:24 ` Rasmus Reinholdt Nielsen
2003-04-10 11:20 ` Kim Jensen
2003-04-10 10:42 ` Johannes Walch
` (2 subsequent siblings)
4 siblings, 1 reply; 7+ messages in thread
From: Rasmus Reinholdt Nielsen @ 2003-04-10 10:24 UTC (permalink / raw)
To: James Marcinek, netfilter; +Cc: jmarc1
port 25 tcp will do for smtp, but you will need 110 tcp as well if you need
pop3 access from the Internet.
/Rasmus
At 02:39 10-04-2003 -0700, James Marcinek wrote:
>Hello All,
>
>I'm trying to set up my mail server; however I want to
>make sure that I have the correct port(s) open. I
>already have TCP port 25 open; however do I also have
>to have UDP port 25 open as well? Any help would be
>appreciated.
>
>Thanks,
>James
>
>__________________________________________________
>Do you Yahoo!?
>Yahoo! Tax Center - File online, calculators, forms, and more
>http://tax.yahoo.com
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: What ports need to be open to allow for mail?
2003-04-10 10:24 ` Rasmus Reinholdt Nielsen
@ 2003-04-10 11:20 ` Kim Jensen
0 siblings, 0 replies; 7+ messages in thread
From: Kim Jensen @ 2003-04-10 11:20 UTC (permalink / raw)
To: netfilter
>I'm trying to set up my mail server; however I want to
>make sure that I have the correct port(s) open. I
>already have TCP port 25 open; however do I also have
>to have UDP port 25 open as well? Any help would be
>appreciated.
>
Extract from /etc/services:
SMTP:
smtp 25/tcp mail
smtp 25/udp mail
smtps 465/tcp # SMTP over SSL (TLS)
POP:
pop2 109/tcp pop-2 postoffice # POP version 2
pop2 109/udp pop-2
pop3 110/tcp pop-3 # POP version 3
pop3 110/udp pop-3
pop3s 995/tcp # POP-3 over SSL
pop3s 995/udp # POP-3 over SSL
IMAP:
imap 143/tcp imap2 # Interim Mail Access Proto v2
imap 143/udp imap2
imap3 220/tcp # Interactive Mail Access
imap3 220/udp # Protocol v3
imaps 993/tcp # IMAP over SSL
imaps 993/udp # IMAP over SSL
Now, make you picking, standard answer is:
25 for SMTP
110 for POP3
143 for IMAP
/Kim
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: What ports need to be open to allow for mail?
2003-04-10 9:39 What ports need to be open to allow for mail? James Marcinek
2003-04-10 10:18 ` Raymond Leach
2003-04-10 10:24 ` Rasmus Reinholdt Nielsen
@ 2003-04-10 10:42 ` Johannes Walch
2003-04-10 10:43 ` Jesper Lund
2003-04-10 19:43 ` Rob Sterenborg
4 siblings, 0 replies; 7+ messages in thread
From: Johannes Walch @ 2003-04-10 10:42 UTC (permalink / raw)
To: netfilter
> Hello All,
>
> I'm trying to set up my mail server; however I want to
> make sure that I have the correct port(s) open. I
> already have TCP port 25 open; however do I also have
> to have UDP port 25 open as well? Any help would be
> appreciated.
>
> Thanks,
> James
If you want to run SMTP (the standard case) with your mail server port
25/TCP ist sufficient. Port 25/UDP is not used by sendmail or any other SMTP
server software (as far as I know).
johannes walch
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: What ports need to be open to allow for mail?
2003-04-10 9:39 What ports need to be open to allow for mail? James Marcinek
` (2 preceding siblings ...)
2003-04-10 10:42 ` Johannes Walch
@ 2003-04-10 10:43 ` Jesper Lund
2003-04-10 19:43 ` Rob Sterenborg
4 siblings, 0 replies; 7+ messages in thread
From: Jesper Lund @ 2003-04-10 10:43 UTC (permalink / raw)
To: james_marcinek; +Cc: netfilter, jmarc1
> however do I also have to have UDP port 25 open as well?
No you don't. Byt maybe consider port 110 and 143 for pop3 and imap.
//Jesper
--
www.ballbreaker.dk/antispam.html
^ permalink raw reply [flat|nested] 7+ messages in thread* RE: What ports need to be open to allow for mail?
2003-04-10 9:39 What ports need to be open to allow for mail? James Marcinek
` (3 preceding siblings ...)
2003-04-10 10:43 ` Jesper Lund
@ 2003-04-10 19:43 ` Rob Sterenborg
4 siblings, 0 replies; 7+ messages in thread
From: Rob Sterenborg @ 2003-04-10 19:43 UTC (permalink / raw)
To: netfilter
> I'm trying to set up my mail server; however I want to
> make sure that I have the correct port(s) open. I
> already have TCP port 25 open; however do I also have
> to have UDP port 25 open as well? Any help would be appreciated.
No, just port 25/tcp is fine.
Gr,
Rob
^ permalink raw reply [flat|nested] 7+ messages in thread