Re: [asterisk-users] Is 100 trying mandatory? Can asterisk answer with 180 without prior 100 trying?
Hi Tryba > A (very) dirty workaround would be to drop these packets with iptables > (assuming Linux as OS), something like: > > iptables -t raw -I OUTPUT -p udp -d ipaddrofpbx -m string --algo bm > --from 0 --to 32 --string "SIP/2.0 100 " -j DROP > > Don't try it with TCP :) :-) Indeed, this is what I did with a Mikrotik Firewall that is in front of the * Server: Drop UDP packet with content starting with "SIP/2.0 100 Trying" And this showed, that not the missing 100 Trying is tripping our SBC. So I contacted the Vendor who had a quick look at the 181 Ringing which is not being relayed and found that the issue was the Contact: Header containing two line= attributes. So I'm now trying to contact the vendor of that other PBX to figure out, why it is sending two line= attributes as part of the contact header. Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G-Leiter Commerce Kunden __ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 PrattelnFax +41 61 826 93 01 Schweiz Web http://www.imp.ch __ -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Is 100 trying mandatory? Can asterisk answer with 180 without prior 100 trying?
On Mon, Mar 19, 2018 at 12:59:47PM -0300, Joshua Colp wrote: > > To try to reproduce the problem with our SBC, is there a way to tell > > the asterisk, preferably PJSIP, to directly answer with 180 ringing > > without prior 100 trying? > > The PJSIP channel driver has no option or ability to do this. I do not recall > if chan_sip does. A (very) dirty workaround would be to drop these packets with iptables (assuming Linux as OS), something like: iptables -t raw -I OUTPUT -p udp -d ipaddrofpbx -m string --algo bm --from 0 --to 32 --string "SIP/2.0 100 " -j DROP Don't try it with TCP :) -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Is 100 trying mandatory? Can asterisk answer with 180 without prior 100 trying?
On Mon, Mar 19, 2018, at 12:53 PM, Benoit Panizzon wrote: > Hey List > > I sometimes use our asterisk server to do some debugging or other PBX > and SBC. > > Now we have a case where a PBX is replying an incomming invite with 180 > ringing immediately. It looks like the SBC does not accept this. > > According to my understanding of the RFC 3261 any provisional (aka > 1XX) reply should be good enough to make the sender stop re-sending > invites and accept this as a reply from the destination. > > So 100 trying would be option and a reply could also be directly 180 > ringing. Indeed. In practice though you want to stop the retransmission immediately and you usually don't know of the appropriate response yet so 100 is sent. > > So maybe some RFC specialist could tell me how this is exactly supposed > to work of if I maybe missed some other RFC more clear about that topic. > > To try to reproduce the problem with our SBC, is there a way to tell > the asterisk, preferably PJSIP, to directly answer with 180 ringing > without prior 100 trying? The PJSIP channel driver has no option or ability to do this. I do not recall if chan_sip does. -- Joshua Colp Digium, Inc. | Senior Software Developer 445 Jan Davis Drive NW - Huntsville, AL 35806 - US Check us out at: www.digium.com & www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- Check out the new Asterisk community forum at: https://community.asterisk.org/ New to Asterisk? Start here: https://wiki.asterisk.org/wiki/display/AST/Getting+Started asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
