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VOIP connection DNS issues

wkuk
3: Seeker
3: Seeker

So there are number of threads on here about getting VOIP working and i've read through some of them but has anyone done a summary of the settings that work so the rest of us don't need to dig through 100s of pages of back and forth conversation trying to find the crumbs of information we need?

I have contacted VF support and got the SIP details from them.  And I am reasonably confident I have all the other settings i need but I think I am running into a weird DNS problem and I'm not sure how to solve it.  Might need to talk to VF directly.

All of the stuff i have read so far says that the registrar should be resvoip.vodafone.co.uk and the proxy should be something ending in bbvoice.vodafone.co.uk.

The problem is i cannot resolve these addresses from my connection even if I specifically connect to VF's DNS servers directly.

This is the output from nslookup on my machine:

C:\Users\Person>nslookup
Default Server: dnsserver.localdomain
Address: 192.168.1.1

> server 90.255.255.255
Default Server: bbdns.vodafone.co.uk
Address: 90.255.255.255

> resvoip.vodafone.co.uk
Server: bbdns.vodafone.co.uk
Address: 90.255.255.255

*** bbdns.vodafone.co.uk can't find resvoip.vodafone.co.uk: Non-existent domain

> xbn.Z4.bbvoice.vodafone.co.uk
Server: bbdns.vodafone.co.uk
Address: 90.255.255.255

Name: xbn.Z4.bbvoice.vodafone.co.uk

>

This seems to be the same for any device on my network, weather i use VF's dns or not.  As a result none of the VOIP stuff is working for me.  Am i missing something?  Is this likely to be something local, or do i need to contact VF and get something enabled?

1 REPLY 1

wkuk
3: Seeker
3: Seeker

After some more digging I spotted "mouldybread"s Github page: https://github.com/mouldybread/VodafoneUKVOIPConfig (for anyone also looking) which does consolodate most of the useful info, however this also doesn't completely solve the DNS issue.

They outline on the github page that the DNS requests must be SRV requests so I have tried setting the type to SRV in nslookup which helps a bit for the bbvoice proxy address, but still doesnt provide an IP, and cant resolve the resvoip address at all.

> set type=srv
>
> resvoip.vodafone.co.uk
Server: bbdns.vodafone.co.uk
Address: 90.255.255.90

*** bbdns.vodafone.co.uk can't find resvoip.vodafone.co.uk: Non-existent domain
>
> xbn.Z4.bbvoice.vodafone.co.uk
Server: bbdns.vodafone.co.uk
Address: 90.255.255.90

vodafone.co.uk
primary name server = ukxgl1dn91.vodafone.co.uk
responsible mail addr = dl-dnsadmin.gb.vodafone.co.uk
serial = 3917
refresh = 300 (5 mins)
retry = 120 (2 mins)
expire = 1209600 (14 days)
default TTL = 600 (10 mins)
>

I have tried 3 different voda DNS servers,  90.255.255.90, 90.255.255.91, and 90.255.255.255.  Same result.

Any ideas?