topic Adding app depencendies in General Topics

Adding app depencendies

ce1028 — Sat, 01 Sep 2018 19:41:15 GMT

This might be a dumb question, but I visited 3 clients in the past 2 weeks that did not include application depenendcies in their policy rules

For example, they'll have a rule allowing webex-base, but don't add rtcp, rtp-base, or stun. To be fair, at least 1 of them had a rule that contains an application filter that allows risks 1, 2 and 3, so in that regards, they are allowing the applications. When apply a policy, you'll still get the long list of warnings and that's annoying to me. I guess I'm picky 🙂

How do you all handle it

Re: Adding app depencendies

BPry — Sat, 01 Sep 2018 23:33:48 GMT

@ce1028,

Ya this one gets kind of annoying because there really isn't a good way to fix it. There's an existing Feature Request to allow the ability to supress these warnings, but at the moment it hasn't been implemented at all.

That being said, depending on the configuration this really may not be an issue. Say for example they have rules that already allow [ rtcp rtp-base stun ] further along the rulebase, and then a seperate rule for simply webex-base. You'll still get the warnings, but due to the way the firewall actually works when scanning sessions it won't cause any issues at all.

I've always viewed the warnings as more of a "hey, this might not work the best as configured unless you've already allowed the following".

Re: Adding app depencendies

ce1028 — Sun, 02 Sep 2018 00:33:28 GMT

@BPry hmmm that would be nice feature. Although if rule1 had [rtcp rtp-base stun] and rule 2 had [web-browsing,ssl,webex-base], the firewall should probably be smart enough to realize you have all you need and not give the warning.