VVX411 ,UC Software Version= , voIpProt.SIP.requestValidation.1.method="source" not accept

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VVX411 ,UC Software Version= , voIpProt.SIP.requestValidation.1.method="source" not accept



We have a few VVX411 phones out in the wild, they are getting ghost calls so I've had a poke about & found the 2 lines:



When I put these into the config the phones stop accepting calls....


In the log, i've turned on debug for SIP & can see this:


0722091449|sip |1|00|Try to do source validation
0722091449|sip |1|00|CCallBase::IsTrusted : NAPTR lookup for '<CHANGED>.nebulaip.com' OK
0722091449|sip |1|00|CCallBase::IsTrusted : NAPTR lookup for '<CHANGED>.nebulaip.com' OK
0722091449|sip |3|00|Challenge failed !!

It then appears to send:

0722091449|sipp |0|00| SIP/2.0 400 Bad Request

If I take those 2 lines out it starts to work again.... (but so do the ghost calls.)


the part where it says <CHANGED>.nebulaip.com is the server that it connects to so i'm not sure why it's not working...


I have come across an extra line voIpProt.SIP.requestValidation.digest.realm="PolycomSPIP"


I'm not sure what that does though?


Can anyone shed any light on the matter?





Message 1 of 3
Polycom Employee & Community Manager

Re: VVX411 ,UC Software Version= , voIpProt.SIP.requestValidation.1.method="source&qu

Hello @gdeaks ,


welcome to the Poly Community.

Please ensure you always check the FAQ's and/or utilize the community search before posting any new topics or follow up posts.


Oct 24 2014 Question:How can I prevent tools like sipvicious or nuisance Cisco calls ringing my phone?

Resolution: Please check => here <= or Security Center: Security Bulletin Relating to Worldwide Botnet Dialing H.323-Capable Systems


As we do not know how your phone was configured I suggest you check the above FAQ post.

Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier


If official support is required please check how to phone or open a case here

The title Poly Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. All posts and words are my own & do not represent the views of Employer.


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Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
Please also ensure you always check the VoIP , Video Endpoint , Microsoft Voice , PSTN or other FAQ's in the different sections
Message 2 of 3

Re: VVX411 ,UC Software Version= , voIpProt.SIP.requestValidation.1.method="source&qu



There is an issue with NAPTR and the 2 tags you have added to the phone. unless you have a NAPTR  DNS record the phone wil fail to validate the domain and return a 400 on inbound calls. 

To fix the issue you will need to change the transport from NAPTR to one of the following TCP, UDP, or TLS.

You will need to add/change the following tag.


Replace X with the line. for a single line phone set to 1

Replace Y with the server number. (should be set to 1 unless you configured a second sip server)

Replace Transport with one of the following.


TCPpreferred - TCP is the preferred transport; UDP is used if TCP fails.

UDPOnly - Only UDP is used.

TLS - If TLS fails, transport fails. Leave port field empty (defaults to 5061 ) or set to 5061 .

TCPOnly - Only TCP is used.


Message 3 of 3