Internally OWA/Exchange server works perfectly, both from http and https. Externally everything comes back with a 404 error. It worked last week and for 2 years previously. No changes to the firewall were made.
Until this evening port 80 traffic worked fine as well. Now that is 404 too. According to my ASA 5510 the settings are all fine. It doesn't block port 80 on our web server, which is on a different server.
How can I tell if the ports are open like the ASA states it is? The firewall seems to be the only hang up and I don't know Cisco that well.
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