04-30-2019 12:32 AM
Can someone please explain WHY you would run this command on VGW
1. #no ip address trusted authenticate ?
Surely you WANT ip address authenticate??
2. if I did run this command
#no ip address trusted authenticate
Would I still MUST define a trusted list?
Thanks in advance
Solved! Go to Solution.
04-30-2019 07:29 AM
04-30-2019 01:14 AM
Hi,
I remember this feature coming into play a few years ago.
This was all about anti-fraud
Have a read at this document:-
https://www.cisco.com/c/en/us/support/docs/voice/call-routing-dial-plans/112083-tollfraud-ios.html
04-30-2019 01:52 AM
Hello Alex. I've read that, but I'm still don't understand why you firstly say
#no ip address trusted authenticate
Does this allow all connections?
Or once you've said
#no ip address trusted authenticate
do you then have to define a trusted list?
If you do then surely that's a contradiction?
04-30-2019 03:00 AM
Hi,
If you want to turn off the anti-fraud feature on the voice gateway:-
!
voice service voip
no ip address trusted authenticate
!
REMEMBER -- If you turn off the feature you are leaving your device open to
fraudulent calls. -- BE AWARE
So in answer to yor question all calls will be allowed
04-30-2019 05:52 AM
04-30-2019 06:30 AM
If you apply
!
voice service voip
no ip address trusted authenticate
!
You are turning OFF the call anti-fraud feature.
You will not need any trust lists at all
04-30-2019 07:29 AM
04-30-2019 08:11 AM
04-30-2019 06:46 AM
04-30-2019 07:25 AM - edited 04-30-2019 07:26 AM
+ 5 to Alex for the excellent points he has provided
There maybe cases where you want to turn this off temporarily. If you are doing an integration with a SIP provider and you dont know all their subnet range for signaling/media traffic you want want to turn it off just to get you going. Once you ascertain the IP addresses you need to enable IP address trust list with those IPs. There may be other cases as well, this is just one I could think of
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