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One-way audio behind pfsense firewall | Page 2 | The VoIP ...
https://www.voip-info.org/forum/threads/one-way-audio-behind-pfsense-firewall.10304/page-2
Well, a lot of people have voip providers that cause one-way audio if you don't use static mode, and the argument about TCP stacks not randomizing ports well is BS - maybe 10 years ago that was true. Now, everything behind my firewall that goes outside is either a recent linux stack, freebsd stack, or windows stack.
pfSense Configuration Recipes — Configuring NAT for …
https://docs.netgate.com/pfsense/en/latest/recipes/nat-voip-phones.html
By default pfSense® software rewrites the source port on all outbound traffic. This is necessary for proper NAT in some circumstances such as having multiple SIP phones behind a single public IP registering to a single external PBX. With a minority of providers, rewriting the source port of RTP can cause one way audio.
Pfsense and Asterisk….one-way audio problem with SIP ...
https://forum.netgate.com/topic/465/pfsense-and-asterisk-one-way-audio-problem-with-sip
What is the equivalent for pf and pfsense? To summarize....no success with siproxd as yet (2) Static ports. As an alternative to siproxd, I thought I'd try the new static ports option . This fixes the 'one-way audio' problem on SIP. I now have audio both in and out using a SIP voip provider. I've tested this with Broadvoice, Sipgate and Gossiptel.
PFSense Firewall Settings for VoIP - OnSIP Support
https://support.onsip.com/hc/en-us/articles/204029430-PFSense-Firewall-Settings-for-VoIP
Disable source port rewriting - by default, pfSense rewrites the source port on all outbound traffic. This is necessary for proper NAT in some circumstances such as having multiple SIP phones behind a single public IP registering to a single external PBX. With a minority of providers, rewriting the source port of RTP can cause one way audio.
One way audio on VOIP, but why? - Netgate Forum
https://forum.netgate.com/topic/93587/one-way-audio-on-voip-but-why
In my experience if you are getting one way audio with voip it is a codec issue between endpoints. Try hardcoding your endpoints to use ulaw or alaw which is typically supported by all endpoints and voip servers to see if that clears it up. 0 W wil Jan 2, 2016, 7:43 PM I just tried changing codecs, but, unfortunately there is no difference. 0
PfSense VoIP Configuration | VoiceHost - UK VoIP Provider
https://www.voicehost.co.uk/help/pfsense-voip-configuration
Configure pfSense firewall/nat rules RTP . Add a NAT rule for RTP. This is essential or you will have no audio or one way audio in your calls. Also change the NAT IP to whatever your Asterisk server is and change the description to something that makes sense for you.
pfSense Configuration Recipes — Configuring NAT for a VoIP ...
https://docs.netgate.com/pfsense/en/latest/recipes/nat-voip-pbx.html
Configuring NAT for a VoIP PBX¶ For VoIP there are typically a few components to get right for proper inbound and outbound audio from a local PBX. Port forward entries with firewall rules (Or 1:1 NAT with Firewall Rules) Manual Outbound NAT with a rule at the top set to perform static port NAT on traffic from the PBX (Or 1:1 NAT)
Help me solve one way audio problem : PFSENSE
https://www.reddit.com/r/PFSENSE/comments/bwrcdc/help_me_solve_one_way_audio_problem/
Sounds like the classic one way audio NAT problem. The VoIP Guys cover this and many other aspects of VoIP. They also have a good video showing how to use tcpdump to capture packet that you can then view in Ethereal. Edit: fix link
One way audio, can't figure it out - General Help ...
https://community.freepbx.org/t/one-way-audio-cant-figure-it-out/12934
If your PBX is behind a NATting firewall, and that firewall is doing source port rewriting it’s very likely that it will cause a one-way audio issue where you have no in-bound audio. They can hear you but you can’t hear them. Additionally because that inbound traffic doesn’t reach your PBX, it will drop the call after a timeout period.
[SOLVED] Intermittent one way audio with VoIP - double NAT ...
https://community.spiceworks.com/topic/1469500-intermittent-one-way-audio-with-voip-double-nat-issue-possibly
I am running into a very frustrating issue with one way audio very intermittently on some calls. 99% of calls work fine but now and again I am experiencing one way audio - this can be both ways. I've taken this up with my VoIP provider and then have asked for a WAN side capture, which due to my setup I am unable to provide.
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