Missed phone calls or delayed texting with Verizon Wi-Fi Calling

Kirby Witmer — Tue, 09 Jan 2024 22:28:47 +0000

We’ve had several clients who complained that Wi-fi calling wasn’t working properly after we installed a Barracuda Cloudgen Firewall. I had tackled this issue on several occasions, but never was able to get a resolution. Barracuda tech support did not have an answer either. Thanks to a random reddit thread, I found the answer.

On pfsense, make sure to update your UDP multiple state timer. It’s in System->Advanced->Firewall & NAT

By default it is set to 15 seconds, and phones refresh their WiFi Calling tunnels at 60 seconds on iOS, and 60+15 random seconds on Android. You should set it to at least 90 seconds to prevent tunnels from being closed prematurely. I recommend setting it to 900 seconds (15 minutes).

You’ll know you need this if you miss incoming calls, or they randomly go to voicemail, and if you have delays in incoming text messages. You’ll also see sessions with low state timers in Diagnostics: pfTop (filter for “udp port 4500” to see all active WiFi Calling sessions bidirectionally)

In this case, he was using a pfsense firewall, but it’s the same problem. On the Barracuda firewalls, creating a firewall rule with UDP timeouts increased on UDP port 4500 will resolve it.

Barracuda Firewall Command Line (SSH) Speed Test

Kirby Witmer — Thu, 15 Nov 2018 20:33:59 +0000

Sometimes when you are trying to diagnose an internet speed or performance issue, it’s helpful to be able to run a speedtest from the router itself. We use Barracuda NextGen F Series Firewalls a lot, and the following command works like a charm. Simply login in via SSH into the router and run this command.

speedtest-cli

You should get a response that looks like this..

Hope this helps.

barracuda firewall – Kirb.IT

Missed phone calls or delayed texting with Verizon Wi-Fi Calling

Barracuda Firewall Command Line (SSH) Speed Test