[Spce-user] General Comments and Questions

Tue May 22 12:58:37 EDT 2012

Hi!

Congratulations to sip:provider, it is a great product and I really like 
the provided features and the way it is structured.

While playing with spce I wrote down my experiences. You might be 
interested to e.g. improve documentation or the product.

A) I would add usage of kamctl to the manual:

section 3.1.1.1

Add to last paragraph: For details about the Kamailio processes you can 
use the kamctl tool: 'OSER_FIFO=/var/run/kamailio/kamailio.lb.fifo 
kamctl ps'.

section 3.1.1.2

Add to last paragraph: For details about the Kamailio processes you can 
use the kamctl tool: 'OSER_FIFO=/var/run/kamailio/kamailio.proxy.fifo 
kamctl ps'.

B) web password and sip password for subscribers

Probably brute-force hacking is mitigated by PIKE module, but the 
default password length of 6 characters is IMO to short and may be 
extended, eg. 12 characters. Especially SIP passwords need not be 
remembered as they are stored in the phone. It would also be cool if the 
web interface can help in choosing IDs (external IDs, web/sip usernames, 
passwords) e.g. by choosing subscriber usernames derived from account 
username and random passwords.

C) IMO it is confusing that some parts require the E.164 number without 
leading + (e.g. subscriber's number), and some with leading + (e.g.: 
allowed_clis). For example when configuring "Peering Rules" I do not 
know what to put into the caller pattern, e.g. +43, or only 43 to use 
this route for calls to Austria. Of course reading the manual tells me 
to omit the +, but the web interface could be improved by using for 
example "string, caller pattern, e.g. 431 for calls to Vienna/Austria" 
instead of "string, pattern". One more: blocklists require a +4312345 
pattern whereas NCOS requires a 4312345 pattern (according to the manual).

D) In input fields which expect a pattern/regexp it is unclear how the 
string is interpreted, e.g. when defining Number Patterns for NCOS Level 
and I want to block calls to Austria 09xx, what do I have to enter? The 
mouse-over tool-tip tells me "POSIX regular expression", thus I would 
need to enter ^439.* but the manual in section 5.1.2.2 tells me to use 
439* which is not a POSIX expression but some proprietary pattern 
matching. This confuses me in many input forms when defining 
strings/patterns/regexps.

E) Is there a global option to 'always_use_rtpproxy' for ALL calls? I 
guess forcing the proxy for all configured 'domains' should have the 
same effect?

F) Is there a way to record conversations, e.g. for lawful intercept?

G) An included flash-player would be nice to playback the voicemail WAV 
files in the subscriber web interface.

H) For call-forwardings it would be nice if there would be a global 
"Destination Set" called "Voicebox/Voicemail/Sprachbox". IMO it is not 
intuitive for subscribers to first create a Destination Set to allow 
forwardings to the voicebox.

I) The keep-alive OPTIONS requests contains the P-NGCP-Src-... Headers - 
IMO they should not be sent to the subscribers:

OPTIONS sip:55.44.33.3:25488 SIP/2.0
Max-Forwards: 10
Record-Route: <sip:55.44.32.175;r2=on;lr=on;ftag=32a293c3;ngcplb=yes>
Record-Route: <sip:127.0.0.1;r2=on;lr=on;ftag=32a293c3;ngcplb=yes>
Via: SIP/2.0/UDP 
83.136.32.175;branch=z9hG4bK859e.d70c6edae31c74d9691b07a7d56df889.0
Via: SIP/2.0/UDP 127.0.0.1:5062;rport=5062;branch=0
From: sip:pinger at sipwise.local;tag=32a293c3
To: sip:55.44.33.3:25488
Call-ID: 8d170825-e2581a31-4d380f6 at 127.0.0.1
CSeq: 1 OPTIONS
Content-Length: 0
P-NGCP-Src-Ip: 127.0.0.1
P-NGCP-Src-Port: 5062
P-NGCP-Src-Proto: udp
P-NGCP-Src-Af: 4

J) Reloading web server config gives the warning:

apache2: Could not reliably determine the server's fully qualified 
domain name, using 127.0.0.1 for ServerName

It would be nice if this warning could be avoided (or did I missed some 
configuration?).

K) The default voicemail template causes emails like:
[Voicebox] New message 1 in voicebox 8d880382-00b8-411b-bb74-a91ec1e2819e
"You have received a new message from sipmausi002 in voicebox 
8d880382-00b8-411b-bb74-a91ec1e2819e on Tuesday, 22 May 2012 um 14:55:50."

IMO it would be nice if the default template shows the caller's and 
callee's phone numbers instead of the callee's subscriber-id and 
caller's SIP identity.

regards
Klaus