snom 200 outbound call puzzle

#1
I have 2 snom 200 phones and I'm having a problem with them. It seems that both phones register with sip.voipfone.co.uk without any problems however, when it comes to placing a call, I can't. I try to call and the phone responds "unavailable". This isn't just for calling landlines either. This is when calling any number including other voipfone users and numbers such as 1571 , 151 or 155. I do have a no name Taiwan brand SIP phone that doesn't have this problem at all which is why I think this is a snom issue. Has anyone else come across this? Any solutions?

My phones are using firmware 3.56z

#2
I can't be sure it's a factor, but the firmware we're using on our Snom 190s is 3.60x. You might want to try updating to this version.

If the problem persists, capture a SIP Trace from the phone and post it here.

#4
If you obscure anything that starts with:

<sip:12345678

Where "12345678" is your account number, then there should be nothing that identifies your account.

Passwords are transmitted encrypted, so you shouldn't need to worry about disclosing them.

Personally, I wouldn't worry too much about disclosing your account number ... if someone really wanted to find out valid account numbers they'd just iterate from a known account.

They'd still need to know (or find) your password, and there's a million possible passwords for each account.

Plus, I'm sure a high number of authentication failures against any single account would show up on Voipfone's radar. Actually, that's an interesting point ... I'll post separately on that!

#5
Here is the SIP trace with the 3.56z firmware. I haven't changed it to the snom 190 firmware yet. Should the firmware for the 190 work on the 200?

Sent to udp:195.189.173.12:5065 at 19/12/2006 17:38:06:707 (795 bytes):

REGISTER sip:sip.voipfone.co.uk SIP/2.0
Via: SIP/2.0/UDP 210.19.194.98:63365;branch=z9hG4bK-e915e5ozi65v;rport
From: "Philip Craig" <sip>;tag=hehg7igi89
To: "Philip Craig" <sip>
Call-ID: 3c267805ce4e-qfbwssuhajse@210-19-194-98
CSeq: 558 REGISTER
Max-Forwards: 70
Contact: <sip>;q=1.0
User-Agent: snom200-3.56z
P-NAT-Refresh: 15
Supported: gruu
Allow-Events: dialog
X-Real-IP: 192.168.1.23
WWW-Contact: <http>
WWW-Contact: <https>
Authorization: Digest username="30112781*201",realm="asterisk",nonce="778f6395",uri="sip:sip.voipfone.co.uk",response="0c8b965774dc6fda56b0968ee3eda91b",algorithm=md5
Expires: 60
Content-Length: 0

Received from udp:195.189.173.12:5065 at 19/12/2006 17:38:07:173 (531 bytes):

SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP 210.19.194.98:63365;branch=z9hG4bK-ujwprklqi3qr;rport=63365
From: "Philip Craig" <sip>;tag=hehg7igi89
To: "Philip Craig" <sip>;tag=as532e2833
Call-ID: 3c267805ce4e-qfbwssuhajse@210-19-194-98
CSeq: 557 REGISTER
User-Agent: Voipfone Sip Network
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER
Contact: <sip>
WWW-Authenticate: Digest realm="asterisk", nonce="778f6395"
Content-Length: 0

#6
I'd wrongly assumed that the 190 and 200 used the same firmware ... on checking the Snom website I can see they don't, and that you're on the latest for the 200. I wouldn't try the 190 firmware (and it probably won't load anyhow).

The trace looks fine ... but the phone simply isn't registering. Voipfone is responding saying that the account and/or password isn't valid.

The most obvious response (and one I'm sure you've checked thoroughly) is to make sure that the password you've entered in the phone matches the password on your Voipfone account.

If you're sure it does, you'll need to contact Voipfone support.

#7
Yup, the password is correct. The strange thing is that phone shows that it is registered. It shows the account number on the display not "NR".

I tried loading the 190 firmware and found that it doesn't load.

*WARNING OVER PASTING VOIPFONE SIP HEADER INFO IN POSTS*

#10
davidgu wrote:If you obscure anything that starts with:
<sip:12345678

Where "12345678" is your account number, then there should be nothing that identifies your account.
So far, good advice.
davidgu wrote:Passwords are transmitted encrypted, so you shouldn't need to worry about disclosing them.

Personally, I wouldn't worry too much about disclosing your account number ...

They'd still need to know (or find) your password, and there's a million possible passwords for each account.
WRONG WRONG WRONG WRONG WRONG! The worst possible advice, and dangerous, too. Even moreso now.

Voipfone passwords are 6 digits. They are encrypted in MD5, which as of 2010 is considered "cryptographically broken and unsuitable for further use",

That user's password is 1*4*02 (although it's probably a dead account, I obscured it a bit out just in case).

That took me 6 lines of copy/paste javascript and under 3 seconds on a bottom end single core PC.

If you post your VOIPFONE authentication headers anywhere without changing all the details, you might as well have just posted your username and password in the clear.

Meantime, just pray that no-one intercepts your SIP headers either.

In either case, it will be, as they say, a case of "all your call are belong to us" :)

If you're using the default 6 digit password, I'd urge you to contact support and get it changed immediately.

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