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Compatibility issue with Zoiper and CSipSimple apps #422

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Eugene-Savenko opened this issue Apr 4, 2016 · 4 comments
Closed

Compatibility issue with Zoiper and CSipSimple apps #422

Eugene-Savenko opened this issue Apr 4, 2016 · 4 comments
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@Eugene-Savenko
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@Eugene-Savenko Eugene-Savenko commented Apr 4, 2016

  1. It happens with both Zoiper and CSipSimple: they can't register UDP transports in VPN mode while TCP ones goes normal. Zoiper try to play smart and falls back to TCP transport after few minutes, so it will be better to show honest CSipSimple.
  2. I don't have DNS Filtering enabled and use Google DNS in my router.
  3. CSipSimple screeen attached. First two accounts there are TCP, and last one failing is UDP.
    The bug is gone swithcing to proxy mode instead of VPN.

image

logs: FGD-169-28205

@ameshkov

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@ameshkov ameshkov commented Apr 4, 2016

User comments (may be important):

Alas, using ICE I can make csipsimple register, but any VOIP call failing.
Could you made your VPN somehow completely not touch the phone IP address for UDP (not make it 172.16.16.1) to avoid double NAT problem?

Connection to 188.246.162.118:5060 is failing reg.dc-tc.com due to timeout (no response from other side?)
It seems you use personal subnet 172.16.16.1, so double NAT happens. I'll try to turn on ICE instead of STUN to bypass double nat.

@ameshkov ameshkov added the Bug label Apr 4, 2016
@ameshkov ameshkov added this to the 2.5 milestone Apr 4, 2016
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@ameshkov ameshkov commented Apr 4, 2016

Test build (changed VPN subnet to 172.16.209.xxx):
https://cdn.adguard.com/public/Adguard/github/AdguardForAndroid/issue422/adguard.apk

I guess we should add a low-level setting so that user could change it manually.

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@ameshkov ameshkov commented Apr 5, 2016

Seems the issue is not with the subnet.

We should add these apps to default net exclusions:
com.zoiper.android.app
com.csipsimple

@Revertron

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@Revertron Revertron commented Apr 14, 2016

Done.

@Revertron Revertron closed this Apr 14, 2016
@ameshkov ameshkov changed the title VPN mode blocks all VOIP (UDP) traffic on OS 6.0.1 Compatibility issue with Zoiper and CSipSimple Apr 14, 2016
@ameshkov ameshkov changed the title Compatibility issue with Zoiper and CSipSimple Compatibility issue with Zoiper and CSipSimple apps Apr 14, 2016
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