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Sonicwall port forward email to vpn
We've had a hardware failure of our spam box and while it is down I want to forward email directly to the email servers. For most I just created a new rule in my sonicwall to send it directly to the email server which is on our lan. One of the email servers is on the other end of a vpn.
The vpn is between my sonicwall tz205 and a tz105. The tunnel is up and working fine. On my lan if I telnet across the vpn to the email server it works just fine but I cannot get the sonicwall to do it. It seems like a pretty simple idea.
I searched google and found a couple of resources for doing this and followed them step by step but it doesn't work for me. There must be a simple way to tell the sonic wall to just forward the mail coming from one external IP address to an IP address on the vpn but I can't seem to find it.
Any help is appreciated.
The vpn is between my sonicwall tz205 and a tz105. The tunnel is up and working fine. On my lan if I telnet across the vpn to the email server it works just fine but I cannot get the sonicwall to do it. It seems like a pretty simple idea.
I searched google and found a couple of resources for doing this and followed them step by step but it doesn't work for me. There must be a simple way to tell the sonic wall to just forward the mail coming from one external IP address to an IP address on the vpn but I can't seem to find it.
Any help is appreciated.
Email ServersHardware FirewallsInternet / Email Software
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AJNS
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See whether you can define an object on the LOCAL Lan that translates through the VPN to the remote mail server.
Not familiar enough with somicwall settings options.
Do you have an SMTP that can be configured to accept messages for this domain but will then forward it to the One through the VPN.
Not familiar enough with somicwall settings options.
Do you have an SMTP that can be configured to accept messages for this domain but will then forward it to the One through the VPN.
Let's say your LAN on the inbound is 192.168.1.0/24 on the remote LAN mailserver has 192.168.0.14
Create a virtualIP 192.168.1.250 that redirects to 192.168.0.24 natting the source I.e. The mail server on 192.168.0.24 will see the request as coming from 192.168.1.250.
Then using a local system on the 192.168.1.0/24 lan see whether you can connect to 192.168.1.250 25 and get the response from the remore mail server. If you can, you would then alter this forwarding rule instead of going to 192.168.0.24 to 192.168.1.250 port 25 and see if that lets you do what you need.
Create a virtualIP 192.168.1.250 that redirects to 192.168.0.24 natting the source I.e. The mail server on 192.168.0.24 will see the request as coming from 192.168.1.250.
Then using a local system on the 192.168.1.0/24 lan see whether you can connect to 192.168.1.250 25 and get the response from the remore mail server. If you can, you would then alter this forwarding rule instead of going to 192.168.0.24 to 192.168.1.250 port 25 and see if that lets you do what you need.
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This really should have been easy to do at the firewall but would just not work.
What I ended up doing was setting up an external relay domain in Exchange 2013 and a send connector for the domain. I then updated the smtp rule on the firewall to forward email to Exchange 2013 which then relays it over the vpn to Exchange.
This did not occur to me until I read the bottom of your first post again about having IIS relay. That made me think of Exchange relaying so thank you for that.
What I ended up doing was setting up an external relay domain in Exchange 2013 and a send connector for the domain. I then updated the smtp rule on the firewall to forward email to Exchange 2013 which then relays it over the vpn to Exchange.
This did not occur to me until I read the bottom of your first post again about having IIS relay. That made me think of Exchange relaying so thank you for that.
I just need to skip the box. For this mail server I tried changing the IP address of the address object for the server to send it to the mail server instead of the spam box but it didn't work. I edited the address object a second time and changed it from the lan zone to the vpn zone but it still didn't work.
I think the issue is I have to allow traffic from the wan to the vpn as well but I'm not sure how to do this for just the Wan IP address I need.