Avamar backups with grsecurity

We have Avamar running on a physical Linux host that has implemented grsecurity patches. All backups for this host fail with a "No Data" status. Right now, grsecurity won't even allow the agent to open a connection with the utility node, so right off the bat there's a connectivity issue to resolve without consideration for other permissions problems that may come up were the agent to try a file system backup. In fact, I can't even ping the utility node while grsecurity is enabled - it blocks me from opening the icmp socket even when I run with elevated privileges. IPtables is not running; this is almost certainly being blocked by grsecurity.

I'm not terribly familiar with grsecurity (this server is administered by someone else; I'm just trying to work on backups for it), so I'm wondering if anyone has experience with getting Avamar to work with it, and if so what needs to be done.