First - I hope I'm posting this to the correct group. That said, here is my scenario. We've got an exchange (2003) backend server sitting on our internal network. On the internet connection side, we have two different DMZ's (the "gateway" to each "DMZ" is a dual NIC ISA2004 server computer - one NIC on the inside - one NIC connected to the external Internet connection). Each of these "DMZ" boxes also runs Exchange 2003 in a front-end configuration. Now for the Exchange side of things - I'd like to be able to send email - and if the internet connection on one of the front-end servers is down - that e-mail will route to the other front-end box and get delivered from there. Does anyone have a suggestion for how best to do this (assuming it can be done)? FYI - I don't mind changing the server topology - my goal is to ensure that both incoming and outgoing mail continues to function when one of our Internet "pipes" is down - assuming that all of the servers in question are online). BTW, incoming works fine - I've just got dual MX records setup - if one fails - external delivery moves to the second. So it's really the outgoing that I'm curious about. Thanks, Richard
What you should do is make both DMZ boxes local or source bridgeheads on the SMTP connector. That'll take care of any issues in the event of a failure of one of the DMZ servers...from the BE. wrote in message news:1118700350.134869.76750@o13g2000cwo.googlegroups.com... First - I hope I'm posting this to the correct group. That said, here is my scenario. We've got an exchange (2003) backend server sitting on our internal network. On the internet connection side, we have two different DMZ's (the "gateway" to each "DMZ" is a dual NIC ISA2004 server computer - one NIC on the inside - one NIC connected to the external Internet connection). Each of these "DMZ" boxes also runs Exchange 2003 in a front-end configuration. Now for the Exchange side of things - I'd like to be able to send email - and if the internet connection on one of the front-end servers is down - that e-mail will route to the other front-end box and get delivered from there. Does anyone have a suggestion for how best to do this (assuming it can be done)? FYI - I don't mind changing the server topology - my goal is to ensure that both incoming and outgoing mail continues to function when one of our Internet "pipes" is down - assuming that all of the servers in question are online). BTW, incoming works fine - I've just got dual MX records setup - if one fails - external delivery moves to the second. So it's really the outgoing that I'm curious about. Thanks, Richard
Does this also handle the situation where both DMZ servers are online and functioning properly - but the Internet connection to it is down?
You mean, situation where network connectivity to the DMZ servers are down ? If so, yes. Lack of network connectivity over port 25, will denote the same thing as the DMZ servers being down or unavailable. wrote in message news:1118943854.268909.200130@f14g2000cwb.googlegroups.com... Does this also handle the situation where both DMZ servers are online and functioning properly - but the Internet connection to it is down?
No - in my situation - I'm assuming that all three servers are up and can talk amongst themselves - the issue that I'm trying to solve is when one of our ISP's pipes (we have two) is down. All three of the servers in question can talk amongst themselves without any problems - the problem is that one of them may not be able to talk out onto the Internet.
