Liptonbrisk wrote:I'll try a fourth FPL number.
emporium wrote:THave not changed anything on my obi202, and neither on my router.
Funny part, is I got 1 call that came in about 1hr ago, but that's it Nothing since. I've even tried calling from a fongo number I have on my cell phone and it does the same.
emporium wrote:
If I use the Old desktop app, I can see the incoming ring, but when I answer, I don't hear anything.
emporium wrote: Under the WAN section, NAT passthrough. For some reason my SIP passthrough was set to "enabled + NAT helper".
Changed it to disabled, saved and rebooted, and all came back to normal.
RMerlin wrote:The NAT Slipstream attack is the one that uses ALGs helpers to potentially compromise clients. I recommend making sure none of the settings on the NAT Passthrough page is set to "Enabled + NAT Helper", they should be either "Enabled" or "Disabled". I haven't tested this, but I would expect that ensuring NAT helpers are disabled to be enough to prevent this attack vector.
Those ALG are generally not needed by modern clients. For instance, I have both an ATA (for my home phone) and a direct IP phone (for work) here, both work fine without the need for an ALG helper.
RMerlin wrote:"NAT Helper" = ALG. So if it's not showing "NAT Helper" then it means the ALG aren't used.
emporium wrote:I find it strange how it was working before (for so many years) with that setting
EliG wrote: A friend with an FPL number alerted me that my FPL number stopped responding in the last 2-3 days.
Asus RT-AC68U (stock firmware).
Fongo and FPL are two different accounts.
I checked SIP Passthrough setting in the router. It was set to "enabled".
ADDED: I swear the issue happened on its own without me touching anything in the ATA or the router.
EliG wrote:I will do FPL to FPL test tomorrow.
.
EliG wrote: A friend with an FPL number alerted me that my FPL number stopped responding in the last 2-3 days.
Liptonbrisk wrote:Asus RT-AC68U (stock firmware).
While I don't want to make people do something they don't want, you may wish to consider switching to Merlin due to point D from viewtopic.php?f=8&t=20182#p78900.
Liptonbrisk wrote:Fongo and FPL are two different accounts.
Yes, it's impossible for them not to be.
Liptonbrisk wrote:I checked SIP Passthrough setting in the router. It was set to "enabled".
As a result of the security issue I mentioned earlier, I recommend keeping that setting disabled. It's the same as having NAT Helper enabled in Merlin.
...
I could dig out another Asus router from my basement to test with official Asus firmware, but it's not worth the effort. It's simpler and safer to just keep SIP Passthrough off in official Asus firmware or NAT Helper off in Merlin.
Liptonbrisk wrote:Before testing, please follow the steps below, step by step, down the list.
EliG wrote:We did the test before I adjusted the settings in the ATA (as per your recommendations). I am guessing that disabling SIP Passthrough in the router did the trick.
Sorry, I wasn't sure. Spelled it out just to be safe.
That was very helpful.
Liptonbrisk wrote:EliG wrote:We did the test before I adjusted the settings in the ATA (as per your recommendations). I am guessing that disabling SIP Passthrough in the router did the trick.
Behaviour with SIP Passthrough changed awhile ago in an older Asus firmware version. Do you happen to know what firmware version you were using?
Liptonbrisk wrote:It would be interesting to test with the new changes you've made and the latest Asus router firmware version. If you'd like to test again, please follow these steps:
1) Enable SIP Passthrough.
2) Reboot Router. Wait for it to be completely up and running.
3). Reboot ATA.
4) Have your friend call you on Fido.
Afterwards, disable SIP Passthrough again and keep it off. Please let me know the version of the Asus router firmware version used.
Liptonbrisk wrote:
B) a router that lets you disable SIP ALG if it's buggy,
To understand why SIP ALG often causes horrible problems, please visit
https://www.voip-info.org/routers-sip-alg/ (scroll down to the section on SIP ALG problems).
If you're dealing with a modem/router combo issued by an ISP or a router with SIP ALG forced on, you may have
to use voip4.freephoneline.ca:6060 for the Proxy Server. The purpose of voip4.freephoneline.ca:6060 is to circumvent
faulty SIP ALG features in routers.
jawsont wrote: now SIP passthrough is DISABLED
RMerlin wrote:"NAT Helper" = ALG. So if it's not showing "NAT Helper" then it means the ALG aren't used.
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