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Forward SMTP to spamappliance - 28.Mar.2008 4:22:05 AM

himpe

Posts: 3
Joined: 28.Mar.2008
Status: offline

Hi,

I have a SBS2003 R2 premium installed on a customer site.
Up untill yesterday everything worked fine without ISA installed.

At the SBS2003 i forwarded port 25 in RRAS to the ip adres of the spamappliance (sonicwall ES200) wich then forwards all good mail to the SBS's exchange.

Yesterday i installed the ISA2004 including SP3.
I did my usual configuration and then published a new "mail server" (wich basically forwards port 25 trafic to the appliance again)
I also allow all outbound trafic.

Only now when i connect using telnet from outside the network i get the headers of the sonicwall appliance but i'm disconnected immediatly ( "connection to host lost" )

I have 2 similar setups at customer sites at the moment wich work fine.

Only difference is this site has R2 and ISA SP3 installed.

I allready logged what is happening in ISA and i see that the request is put through to the sonicwall but i only get an answer 20 secs later ...

If you have any suggestions please let me know.

Post #: 1

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RE: Forward SMTP to spamappliance - 28.Mar.2008 6:09:04 AM

himpe

Posts: 3
Joined: 28.Mar.2008
Status: offline

This is my firewall policy

(in reply to himpe)

Post #: 2

RE: Forward SMTP to spamappliance - 28.Mar.2008 10:33:47 AM

TitusHoc

Posts: 114
Joined: 17.Nov.2004
From: Canada - Toronto
Status: offline

What is with the access rule number 13? Do you have SMTP running on ISA? You can have a conflict on port 25 on ISA External interface

Can you run this command on ISA and share the result?
netstat �aon |find �:25�

Titus

(in reply to himpe)

Post #: 3

RE: Forward SMTP to spamappliance - 31.Mar.2008 4:25:09 AM

himpe

Posts: 3
Joined: 28.Mar.2008
Status: offline

quote:

ORIGINAL: TitusHoc

What is with the access rule number 13? Do you have SMTP running on ISA? You can have a conflict on port 25 on ISA External interface

Can you run this command on ISA and share the result?
netstat �aon |find ":25�

Titus

Hi Titus,

thanks you for your response

The exchange is running on the SBS2003 aswell. So i'm routing trafic from the external interface to the sonicwall app then i forward good mail from the sonicwall to the isa internal interface wich is the exchange.

Here is the result from the netstat -aon | find ":25" command with the above rules !
So smtp redirect to sonicwall DISABLED

TCP 0.0.0.0:25 0.0

< Message edited by himpe -- 31.Mar.2008 6:01:38 AM >

(in reply to TitusHoc)

Post #: 4