Hi I have 3 5505 that all have very similar "quirks".
The device has been working normally for the last few months then suddenly decide not to allow owa traffic through, however a second site which we use to collect xml from our clients is working fine. I have resarted and cleared the translates but it hasn't helped any advice would be greatfully recieved.
Can you telnet to port 80 from the outside? Check your IIS server where OWA resides, and make sure you don't have restrictions on who can access OWA. By the way, what type type of error are you getting when you try to access it from the outside?
You need to run traffic captures to see what's going on. Configuration seems to be ok as you say sometimes works and sometimes not.
It's recommendable to narrow down the captures by matching only the interesting traffic. Let's suppose the public IP of the server (which uses port 80) is 220.127.116.11 whereas the private is 192.168.1.1 and that user testing from the outside has IP 18.104.22.168:
You can check the files using ethereal or any other similar software. In this way you'll be able to determine whether the firewall is dropping the traffic or not. Although it's pretty likely it's not a fw issue, you can check the flags of the TCP packets, perhaps some R or F flags are being sent by the server. You can also run some logs.
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