It used to send emails under our old one firewall, but since we went with Cisco it doesn't work now. So the ports would need to be opended for the DMZ on the firewall?
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Unable to forward SMTP Traffic on DMZ
I'm currently using Win Srv 2003 Web Ed for my web server. I have a form in which the results are sent to me via Email. However, I'm not receiving those emails. They are just sitting in queue. My server is attached to the DMZ of a Cisco PIX 515E firewall. Do I need to have a policy to allow SMTP traffic to travel from and to the webserver, for emails to send?
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Answers
Hi Joe_27,
Because the mail is sitting "in queue", it appears that the host is unable to connect with the e-mail server.
From the Win server, try to ping the e-mail system and then do a traceroute to it.
If both are successful, the messages are probably being blocked by a firewall. The traceroute MAY stop at the firewall, depending on what is being let through so this won't be a definitive test.
Good Luck,
Kent
This webserver is trying to send outbound mail with IIS' SMTP service. This webserver work with a different firewall other than the PIX. So I don't know if it was set up to do smtp traffic outbound from the DMZ.
Kent, as far as it trying to communicate to our main mail server, I had it set to not allow DMZ traffic to touch the internal network.
Hi Joe,
Is the web server in the DMZ trying to send email to a mail server on your internal network?
Check to make sure you have a line like this:
static (inside,dmz) <IP range of internal network> <IP range of internal network> netmask 255.255.255.0
If you post your config without passwords and external IP's we can probably help a little more.
--Chris
You will need a rule in the PIX config to allow your Web Server to resolve the DNS portion of your mail address (port 53), and to send and receive mail (port 25).
Assuming your Web Server has a public IP address, this should be quite easy to setup, but it can work with NAT as well if you need it to.
Details are here. If you don't understand these, post up your config / network topology and we will modify it for you ! :)
http://www.cisco.com/en/US
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by: KdoPosted on 2004-01-28 at 12:57:54ID: 10221926
Hi Joe_27,
Depending on your e-mail implementation, any of several mail ports may need to be opened. SMTP, POP3, IMAP, etc.
Kent