There are signatures for AIM, Yahoo Messenger, and Microsoft Messenger available. I'm not quite sure off-hand where these were introduced or if they require the 4.0 engine.
I could not vouch for the efficiency of these signatures though.
With regards to web-mail, that's a bit tougher since it's going over port 80 and there are so many providers. You might want to look at a URL-filtering application like WebSense or N2H2. Alternatively you could find the addresses of some webmail servers and write a custom signature to alert on http connections to those servers.
BenefitsDocumentationPrerequisiteImage Download LinksLimitationsSupported PlatformsLicense RequirementsTopologyStep-By-Step ConfigurationConfigure Virtual ServiceActivate the virtual service and configure guest IPsConfiguring UTD (Service Plane)Configurin...
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...