Skype call drop6/3/2023 ![]() ![]() ![]() Around the same time, we replaced the Fortigate with a UniFi USG Pro, and it worked for a few months. Our ISP changed our public IP address space.No SIP ALG is, or has ever, been enabled on any firewall.Split tunneling is enabled, so all Internet-bound traffic from the remote user should go directly to the Internet.Our remote users connect using OpenVPN running on a pfSense box behind the gateway.Previously, we had a Fortigate firewall.This is a cloud-based Office365 deployment.If an office user tries to present/share their desktop, the presentation starts, then stops after exactly 5 seconds with a "network error." Again, remote users can share to office users with no issues.If a Lync call originates from inside our office, to a remote VPN user, the call connects with two-way audio, but disconnects after exactly 5 seconds with a "network error." If the remote user calls the office user, no problems.Here is the information: Problem Statement: It's an odd problem, and I've opened a ticket with Microsoft, but thus far, that has proven fruitless. I'm having a problem with Skype for Business (Lync) disconnecting behind a pfSense firewall after exactly 5 seconds.
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