Hello,

the SSTP_DUPLEX_POST ids about a special Microsoft VPN protocol, which do not make much sense in this VoIP context, I think.

As a first step I’d suggest an update to the latest 5.5.x version, there might be some bug fixes and improvements that help in your case. The branch 5.3 at the end of its life.

Cheers,

Henning

--

Henning Westerholt – https://skalatan.de/blog/

Kamailio services – https://gilawa.com

From: sr-users <sr-users-bounces@lists.kamailio.org> On Behalf Of dolphin
Sent: Wednesday, May 18, 2022 4:43 AM
To: sr-users@lists.kamailio.org
Subject: [SR-Users] kamailio WebSocket not respond sometimes

Hello,
 
 
kamailio could not respond to the question:
This machine is on aws, there is no high load, there is an external ip listening to the WebSocket 443 port, and sometimes there are some unknown detection signals "SSTP_DUPLEX_POST" that will cause port 443 to fail to respond. Need to restart kamailio
 
Then, it stopped responding again after about a month.

Attach the detailed log

details:
root@sip1-aws:~# /home/pkg/kamailio/sbin/kamailio -V

version: kamailio 5.3.9 (x86_64/linux) a5fd0a
flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES
ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB
poll method support: poll, epoll_lt, epoll_et, sigio_rt, select.
id: a5fd0a
compiled on 22:31:18 Mar 31 2022 with gcc 5.4.0

Thanks.