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Can't connect to Exchange 2003 after installing ISA 2004

Hey,

We have recently tried to install ISA 2004 onto our SBS2003 server. The installation is succesful but when we then go to the clients and try to connect, it won't connect to Exchange server. We've tried removing a reinstalling it, clearing the rules, creating custom rules, updating the server but we can't seem to get the clients to connect. But, outside the building we can connect fine as I created an outlook profile on an external PC and VPN'd in fine and could connect to Exchange as normal.

Has anyone had a similar issue or know of a starting point to trouble shoot this issue? The server is mission critical so we can only troubleshoot it out of office hours which is adding to the problem.

Any help is much appreciated,

Thanks.

P.S I tried to add this under ISA zone but it kept saying 'not valid'
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ConanUK
Asked:
ConanUK
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1 Solution
 
jacodaletCommented:
check the firewall settings on the server as this is the cause of the problem
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ConanUKAuthor Commented:
Can u be specific please, I have checked these and at the mo we've not got ISA on at the mo so I assume you mean Windows Firewall. I've checked that port 25 is still open as I'm assuming that what Exchange uses to communicate over.
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jacodaletCommented:
You can stop all services of ISA but the problem will still exist, had the same problem 2 weeks ago stop all services and could not received mail, had to uninstall ISA to get this sorted.

Have to remember that if your rules are not configured correct your mails will not work.

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ConanUKAuthor Commented:
As I said before ISA is already uninstalled as it stopped the company receiving mission critical emails. The rules were the default rules from a standard isa 2004 installation on an sbs2003 then I created my own to make sure all internal traffic was allowed to test but the problem still occurred.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
Did you run the Configure E-mail and Internet Connection Wizard (usually fires right after install/uninstall)?

If not, or errors were had, run it again: SBS Console --> To Do --> Connect to the Internet.

Also, if you have a gateway appliance or router verify that the SMTP port has not been closed or the port forward rule has been disabled.

Philip
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ConanUKAuthor Commented:
Hi Philip,

Yes I've done and checked both. CEICW has been ran with no errors (a fair few times by now) and port 25 is open.

Thanks.
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
ISA 2004 can live log for you.
ISA console --> Monitoring --> Logging --> Start Query.

Please verify that your network is set up correctly:
NIC 1 (SBS)
 192.168.99.254 IP
 255.255.255.0 Subnet
 192.168.99.254 GW
 192.168.99.254 DNS1

NIC 2 (ISA/DSL Modem - provided by ISP)
  66.77.88.99
 255.255.255.224 Subnet
 66.77.88.1 GW
 192.168.99.254 DNS1 (SBS server)

In the Network Connections window, click on Advanced and make sure the LAN NIC is on top of the WAN NIC. See screenshot.

Verify in the ISA configuration that your internal and external networks have the correct subnets.

Might want to start fresh with ISA and SP3.

Philip
09-03-16-SBS-NIC-Order.PNG
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ConanUKAuthor Commented:
Thanks for this, I've checked an confirmed that all to be correct. Last night after suspecting the DNS we removed the forward lookup zones, reinstalled DNS and re-issue'd DHCP addresses. I've had to manually recreate the zones and add the CNAME for companyweb manually but it's certainly sorted the website issues and I have a feeling that this will sort the ISA issue out, which I will find out later today when I try to install it - I'll let you know how it goes!
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Philip ElderTechnical Architect - HA/Compute/StorageCommented:
The CEICW would fix those settings up.

Philip
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