[Freeswitch-users] Getting 403 trying to register an ATA to freeswitch

[Babak Yakhchali]

Hi
I have a grandstream ata(HT701) behind nat which is trying to register to
freeswitch with public ip but it is getting 403. Zoiper is working fine
with same configuration. These are sip messages after enabling siptrace

recv 812 bytes from udp/[x.x.x.x]:5060 at 06:39:06.476367:
   ------------------------------------------------------------------------
   REGISTER sip:y.y.y.y:5070 SIP/2.0
   Via: SIP/2.0/UDP 192.168.33.109:5060;branch=z9hG4bK951798483;rport
   From: "100" <sip:100 at y.y.y.y:5070>;tag=1551799885
   To: <sip:100 at y.y.y.y:5070>
   Call-ID: 1772924103-5060-2 at BJC.BGI.DD.BAJ
   CSeq: 2012 REGISTER
   Contact: <sip:100 at 192.168.33.109:5060
>;reg-id=1;+sip.instance="<urn:uuid:00000000-0000-1000-8000-000B829D0E35>"
   Authorization: Digest username="100", realm="y.y.y.y",
nonce="a5163fda-cb35-11e6-bc3a-6bd3c5b5a0c6", uri="sip:y.y.y.y:5070",
response="b3e394d5f59e1e3c79cc5ec596d132e1", algorithm=MD5,
cnonce="09249246", qop=auth, nc=00000008
   Max-Forwards: 70
   User-Agent: Grandstream HT701 1.0.8.2
   Supported: path
   Expires: 180
   Allow: INVITE, ACK, OPTIONS, CANCEL, BYE, SUBSCRIBE, NOTIFY, INFO,
REFER, UPDATE
   Content-Length: 0

   ------------------------------------------------------------------------
send 548 bytes to udp/[x.x.x.x]:5060 at 06:39:06.569125:
   ------------------------------------------------------------------------
   SIP/2.0 403 Forbidden
   Via: SIP/2.0/UDP 192.168.33.109:5060
;branch=z9hG4bK951798483;rport=5060;received=x.x.x.x
   From: "100" <sip:100 at y.y.y.y:5070>;tag=1551799885
   To: <sip:100 at y.y.y.y:5070>;tag=0r6HXSrXZD44a
   Call-ID: 1772924103-5060-2 at BJC.BGI.DD.BAJ
   CSeq: 2012 REGISTER
   User-Agent: FreeSWITCH-mod_sofia/1.2.14+git~20131019T195513Z~44680b31d9
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE,
REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
   Supported: timer, precondition, path, replaces
   Content-Length: 0
 how can I debug this?
thanks
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