TuxedoMan
asked on
Change Default Gateway on Exchange Server
Problem:
We have a new ISP and a new firewall device. The old setup was via an ISA Server (also DNS and PDC) with a 10.2 address. Exhange server (10.1 address) currently has its default gateway as 10.2.
Installed Meraki NSA to the new ISP. It is on the same subnet and its interal ip is 10.254. Web browsing is fine on all my clients after changing cliet default gateway to point to the new gateway 10.254. When I change the exchange server's default gateway to 10.254 (and also update the A-Record/Mx Record with the new ISP external address) no mail flows in either direction.
What am I missing/doing wrong?
We have a new ISP and a new firewall device. The old setup was via an ISA Server (also DNS and PDC) with a 10.2 address. Exhange server (10.1 address) currently has its default gateway as 10.2.
Installed Meraki NSA to the new ISP. It is on the same subnet and its interal ip is 10.254. Web browsing is fine on all my clients after changing cliet default gateway to point to the new gateway 10.254. When I change the exchange server's default gateway to 10.254 (and also update the A-Record/Mx Record with the new ISP external address) no mail flows in either direction.
What am I missing/doing wrong?
this is going to soung silly, but is there an exception in your new firewall appliance to allow port 25 to/from your exchange server?
ASKER
I can browse on the server once the change is made. No smart host on the old ISP or ISA. Port 25 is forwarded to the 10.1 exchange server and 80/443 are as well for owa. Incidentally, when changes are made, I can browse from the outside to OWA and I can see the open 25 port as well so forwarding is not the issue here. Strange... very strange.
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ASKER
Did check the ip address when browsing. After changing to new gateway it reflects the new address. Back to the old gateway, I get the old address. Also, no restrictions on receive connectors.
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If not, then this is networking issue, not an Exchange issue.
Sending email could be that you are using a smart host on the old ISP, and need to remove/change it. Or the smart host could be your ISA server or something odd like that.
Simon.