T-Mobile WIFI Calling
-
Ah yes - the old microcells.
Here is out outbound NAT rules. They are unchanged from the default way that they come out of the box.
-
System–>Advanced>Firewall/NAT
This was ticked "Disables the PF scrubbing option which can sometimes interfere with NFS and PPTP traffic. " - I had to untick it and everything now works
I've wasted about 8 hours on this, and 2 cases of corona!...hopefully this helps someone else!
Wish I remember why I had that on in the first place.
-
Cool. Glad you found it. I would have never guessed that would be the answer.
-
me either. It doesn't sound like it has anything to do with it.
I built a new firewall and it worked. Then I loaded my config file sections one by one until it broke. Then did a file compare on the good config and the bad config and then toggled the options one-by-one….
phewwww
-
I recently had to debug getting pfSense working with both t-mobile wifi calling and an at&t microcell.
In addition to making sure all the right IPSEC ports are allowed on the way in on the WAN (500,4500), I also had to make sure bogon networks are not blocked on the WAN interface.
My understanding of this is that both AT&T and t-mobile break standards and use bogon IPs on their networks, which the firewall drops. -
I recently had to debug getting pfSense working with both t-mobile wifi calling and an at&t microcell.
In addition to making sure all the right IPSEC ports are allowed on the way in on the WAN (500,4500), I also had to make sure bogon networks are not blocked on the WAN interface.
My understanding of this is that both AT&T and t-mobile break standards and use bogon IPs on their networks, which the firewall drops.Only within the IPsec connection, not outside of it. Which is fine. Something other than disabling block bogon fixed that, because both of those are strictly outbound traffic, no remotely-initiated traffic that could even match the block bogon. They also wouldn't be able to route bogon source IPs across the Internet in any useful manner. I'm guessing you probably made some NAT changes to fix it, but didn't clear states afterwards, and the states timed out or the device reconnected in the mean time which is what made it start working.
-
Good points. I do have settings to do static outbount NAT on the at&t and t-mobile devices. I will try to re-enable bogon blocking on the WAN and see what happens. Thanks!
-
This was on T-Mobile WIFI Calling but this Fixed my AT&T issue also.
Thanks Guys
-
T-Mobile's incarnation of wifi calling is based on the GAN/UMA standard. IPsec is used to secure the connection. More info in the following links for reference:
https://en.wikipedia.org/wiki/Generic_Access_Network
and
https://www.cisco.com/cdc_content_elements/flash/mobile_sols/partners_site/pdfs/partners/kineto/GAN_UMA_TDM.pdf
and
https://support.onsip.com/hc/en-us/articles/204029430-PFSense-Firewall-Settings-for-VoIP
-
Locking this thread, it's over 4 years old!
If you have new information on a subject please start a new thread.
Steve
