Steven Kan avatar image
Steven Kan asked Steven Kan published

Most Restrictive, Minimally Permissive Firewall Rules for Polycom Phones?

In pursuit of security I'm beginning to segment my network to put "things" outside of my core network, including my VOIP phones. I'm running pfense 2.60 on a Protectli FW4C with 4 ports, and I'm using 3 of them as follows:

Following this documentation I've allowed traffic as follows:

where RingCentral_Supernets is an alias to all the networks from Table 2.1 and PolyCom_Provisioning is an alias to the FQDNs from Table 3.2.6 for my PolyCom phone.

The good news is that my phone works, and it has the correct time. :LOL:

But am I being overly permissive with the * ports for the RingCentral_Supernets? Should I enable only the port ranges required in Table 3.2.6?

Or can we trust the entire RingCentral_Supernets?

1 |3000

Up to 8 attachments (including images) can be used with a maximum of 1.0 MiB each and 10.0 MiB total.

0 Answers

Work together.
From anywhere.

Team messaging, video meetings
and phone - all in one app.

Get the new RingCentral app