[kamailio/kamailio] tls: configuration override with multiple server roles on same socket (#1574)
25 Jun
2018
25 Jun
'18
9:32 a.m.
Hello,
I'm using Kamailio v. 5.1.0-21 on CentOs 6 machine, installed from repository. It is
running behind the NAT. I'm using Htek and Zoiper phones for testing. Below is content
from my tls.cfg configuration file:
```
[server:default]
method = TLSv1.2
method = SSLv23
require_certificate = yes
verify_certificate = yes
private_key = /var/kamailio/certificates/default/server/key.pem
certificate = /var/kamailio/certificates/default/server/cert.pem
ca_list = /var/kamailio/certificates/default/CA/cert.pem
[server:172.16.30.205:5061]
method = SSLv23
require_certificate = yes
verify_certificate = yes
private_key = /var/kamailio/certificates/first.my-domain.com/server/key.pem
certificate = /var/kamailio/certificates/first.my-domain.com/server/cert.pem
ca_list = /var/kamailio/certificates/first.my-domain.com/CA/cert.pem
server_name = "first.my-domain.com"
[server:172.16.30.205:5061]
method = SSLv23
require_certificate = yes
verify_certificate = yes
private_key = /var/kamailio/certificates/second.my-domain.com/server/key.pem
certificate = /var/kamailio/certificates/second.my-domain.com/server/cert.pem
ca_list = /var/kamailio/certificates/second.my-domain.com/CA/cert.pem
server_name = "second.my-domain.com"
[client:default]
verify_certificate = yes
require_certificate = yes
```
My **first** phone is configured with certificate for _first.my-domain.com_ and **second**
- for _second.my-domain.com_.
When I try to connect with **first** phone, it fails. I get following output in Kamailio
log file:
```
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/ip_addr.c:229]: print_ip(): tcpconn_new: new tcp connection:
office_with_phones_public_ip_address
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/tcp_main.c:999]: tcpconn_new(): on port 5360, type 3
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/tcp_main.c:1309]: tcpconn_add(): hashes: 480:2863:2253, 1
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa4ea20, 55, 2, 0x7f605f124d10),
fd_no=42
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/io_wait.h:602]: io_watch_del(): DBG: io_watch_del (0xa4ea20, 55, -1, 0x0) fd_no=43
called
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/tcp_main.c:4196]: handle_tcpconn_ev(): sending to child, events 1
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/tcp_main.c:3878]: send2child(): selected tcp worker 0 31(8168) for activity on
[tls:172.16.30.205:5061], 0x7f605f124d10
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_read.c:1740]: handle_io(): received n=8 con=0x7f605f124d10, fd=12
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: tls [tls_server.c:199]:
tls_complete_init(): completing tls connection initialization
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: tls [tls_server.c:228]:
tls_complete_init(): Using initial TLS domain TLSs<172.16.30.205:5061> (dom
0x7f605eaa7f38 ctx 0x7f605ed545b0 sn [second.my-domain.com])
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: tls [tls_domain.c:724]:
sr_ssl_ctx_info_callback(): SSL handshake started
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: tls [tls_domain.c:927]:
tls_server_name_cb(): SSL_get_servername returned NULL: return SSL_TLSEXT_ERR_NOACK
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_main.c:2460]: tcpconn_do_send(): sending...
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_main.c:2494]: tcpconn_do_send(): after real write: c= 0x7f605f124d10 n=2401
fd=12
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_main.c:2495]: tcpconn_do_send(): buf=
Jun 25 15:36:50 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa92cc0, 12, 2, 0x7f605f124d10),
fd_no=1
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_main.c:2460]: tcpconn_do_send(): sending...
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_main.c:2494]: tcpconn_do_send(): after real write: c= 0x7f605f124d10 n=7 fd=12
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_main.c:2495]: tcpconn_do_send(): buf=
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: ERROR: tls [tls_util.h:42]:
tls_err_ret(): TLS accept:error:140890B2:SSL routines:SSL3_GET_CLIENT_CERTIFICATE:no
certificate returned
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: ERROR: <core>
[core/tcp_read.c:1485]: tcp_read_req(): ERROR: tcp_read_req: error reading - c:
0x7f605f124d10 r: 0x7f605f124d90
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/io_wait.h:602]: io_watch_del(): DBG: io_watch_del (0xa92cc0, 12, -1, 0x10) fd_no=2
called
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_read.c:1664]: release_tcpconn(): releasing con 0x7f605f124d10, state -2, fd=12,
id=1 ([office_with_phones_public_ip_address]:5360 ->
[office_with_phones_public_ip_address]:5061)
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8168]: DEBUG: <core>
[core/tcp_read.c:1665]: release_tcpconn(): extra_data 0x7f605f0bb8f8
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: <core>
[core/tcp_main.c:3308]: handle_tcp_child(): reader response= 7f605f124d10, -2 from 0
Jun 25 15:36:51 kamailio-dev /usr/sbin/kamailio[8180]: DEBUG: tls [tls_server.c:667]:
tls_h_close(): Closing SSL connection 0x7f605f0bb8f8
```
However **second** phone connects with no problems:
```
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9155]: DEBUG: <core>
[core/ip_addr.c:229]: print_ip(): tcpconn_new: new tcp connection:
office_with_phones_public_ip_address
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9155]: DEBUG: <core>
[core/tcp_main.c:999]: tcpconn_new(): on port 53732, type 3
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9155]: DEBUG: <core>
[core/tcp_main.c:1309]: tcpconn_add(): hashes: 1406:4017:3155, 1
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9155]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa4ea20, 55, 2, 0x7fa084d00d10),
fd_no=42
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9155]: DEBUG: <core>
[core/io_wait.h:602]: io_watch_del(): DBG: io_watch_del (0xa4ea20, 55, -1, 0x0) fd_no=43
called
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9155]: DEBUG: <core>
[core/tcp_main.c:4196]: handle_tcpconn_ev(): sending to child, events 1
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9155]: DEBUG: <core>
[core/tcp_main.c:3878]: send2child(): selected tcp worker 0 31(9146) for activity on
[tls:172.16.30.205:5061], 0x7fa084d00d10
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: <core>
[core/tcp_read.c:1740]: handle_io(): received n=8 con=0x7fa084d00d10, fd=12
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_server.c:199]:
tls_complete_init(): completing tls connection initialization
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_server.c:228]:
tls_complete_init(): Using initial TLS domain TLSs<172.16.30.205:5061> (dom
0x7fa084683f38 ctx 0x7fa0849305b0 sn [second.my-domain.com])
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_domain.c:724]:
sr_ssl_ctx_info_callback(): SSL handshake started
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_domain.c:927]:
tls_server_name_cb(): SSL_get_servername returned NULL: return SSL_TLSEXT_ERR_NOACK
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: <core>
[core/tcp_main.c:2460]: tcpconn_do_send(): sending...
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: <core>
[core/tcp_main.c:2494]: tcpconn_do_send(): after real write: c= 0x7fa084d00d10 n=2406
fd=12
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: <core>
[core/tcp_main.c:2495]: tcpconn_do_send(): buf=
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa92cc0, 12, 2, 0x7fa084d00d10),
fd_no=1
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_domain.c:736]:
sr_ssl_ctx_info_callback(): SSL handshake done
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_domain.c:740]:
sr_ssl_ctx_info_callback(): SSL disable renegotiation
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_server.c:415]:
tls_accept(): TLS accept successful
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_server.c:422]:
tls_accept(): tls_accept: new connection from office_with_phones_public_ip_address:53732
using TLSv1/SSLv3 AES256-GCM-SHA384 256
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_server.c:425]:
tls_accept(): tls_accept: local socket: 172.16.30.205:5061
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_server.c:372]:
tls_dump_cert_info(): tls_accept: client certificate
subject:/C=UA/ST=Lviv/O=Test/OU=Dev/CN=second.my-domain.com/emailAddress=vo…
Jun 25 15:40:41 kamailio-dev /usr/sbin/kamailio[9146]: DEBUG: tls [tls_server.c:376]:
tls_dump_cert_info(): tls_accept: client certificate
issuer:/C=UA/ST=Lviv/L=Lviv/O=Test/OU=Dev/CN=second.my-domain.com/emailAddr…
```
After swapping `[server:172.16.30.205:5061]` sections in tls.cfg, **first** phone can
connect:
```
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9852]: DEBUG: <core>
[core/ip_addr.c:229]: print_ip(): tcpconn_new: new tcp connection:
office_with_phones_public_ip_address
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9852]: DEBUG: <core>
[core/tcp_main.c:999]: tcpconn_new(): on port 42055, type 3
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9852]: DEBUG: <core>
[core/tcp_main.c:1309]: tcpconn_add(): hashes: 54:2809:2331, 1
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9852]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa4ea20, 55, 2, 0x7f5ce90d2eb0),
fd_no=42
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9852]: DEBUG: <core>
[core/io_wait.h:602]: io_watch_del(): DBG: io_watch_del (0xa4ea20, 55, -1, 0x0) fd_no=43
called
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9852]: DEBUG: <core>
[core/tcp_main.c:4196]: handle_tcpconn_ev(): sending to child, events 1
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9852]: DEBUG: <core>
[core/tcp_main.c:3878]: send2child(): selected tcp worker 0 31(9842) for activity on
[tls:172.16.30.205:5061], 0x7f5ce90d2eb0
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: <core>
[core/tcp_read.c:1740]: handle_io(): received n=8 con=0x7f5ce90d2eb0, fd=12
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_server.c:199]:
tls_complete_init(): completing tls connection initialization
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_server.c:228]:
tls_complete_init(): Using initial TLS domain TLSs<172.16.30.205:5061> (dom
0x7f5ce8a55fd8 ctx 0x7f5ce8d025b0 sn [first.my-domain.com])
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_domain.c:724]:
sr_ssl_ctx_info_callback(): SSL handshake started
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_domain.c:927]:
tls_server_name_cb(): SSL_get_servername returned NULL: return SSL_TLSEXT_ERR_NOACK
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: <core>
[core/tcp_main.c:2460]: tcpconn_do_send(): sending...
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: <core>
[core/tcp_main.c:2494]: tcpconn_do_send(): after real write: c= 0x7f5ce90d2eb0 n=2371
fd=12
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: <core>
[core/tcp_main.c:2495]: tcpconn_do_send(): buf=
Jun 25 15:47:04 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa92cc0, 12, 2, 0x7f5ce90d2eb0),
fd_no=1
Jun 25 15:47:05 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_domain.c:736]:
sr_ssl_ctx_info_callback(): SSL handshake done
Jun 25 15:47:05 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_domain.c:740]:
sr_ssl_ctx_info_callback(): SSL disable renegotiation
Jun 25 15:47:05 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_server.c:415]:
tls_accept(): TLS accept successful
Jun 25 15:47:05 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_server.c:422]:
tls_accept(): tls_accept: new connection from office_with_phones_public_ip_address:42055
using TLSv1/SSLv3 AES128-SHA 128
Jun 25 15:47:05 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_server.c:425]:
tls_accept(): tls_accept: local socket: 172.16.30.205:5061
Jun 25 15:47:05 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_server.c:372]:
tls_dump_cert_info(): tls_accept: client certificate
subject:/C=UA/ST=Lviv/O=Test/OU=Dev/CN=first.my-domain.com/emailAddress=vol…
Jun 25 15:47:05 kamailio-dev /usr/sbin/kamailio[9842]: DEBUG: tls [tls_server.c:376]:
tls_dump_cert_info(): tls_accept: client certificate
issuer:/C=UA/ST=Lviv/L=Lviv/O=Test/OU=Dev/CN=first.my-domain.com/emailAddre…
```
... but **second** phone can not:
```
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/ip_addr.c:229]: print_ip(): tcpconn_new: new tcp connection:
office_with_phones_public_ip_address
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/tcp_main.c:999]: tcpconn_new(): on port 53873, type 3
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/tcp_main.c:1309]: tcpconn_add(): hashes: 1772:3107:4033, 1
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa4ea20, 55, 2, 0x7fc8bd364eb0),
fd_no=42
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/io_wait.h:602]: io_watch_del(): DBG: io_watch_del (0xa4ea20, 55, -1, 0x0) fd_no=43
called
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/tcp_main.c:4196]: handle_tcpconn_ev(): sending to child, events 1
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/tcp_main.c:3878]: send2child(): selected tcp worker 0 31(9344) for activity on
[tls:172.16.30.205:5061], 0x7fc8bd364eb0
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/tcp_read.c:1740]: handle_io(): received n=8 con=0x7fc8bd364eb0, fd=12
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_server.c:199]:
tls_complete_init(): completing tls connection initialization
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_server.c:228]:
tls_complete_init(): Using initial TLS domain TLSs<172.16.30.205:5061> (dom
0x7fc8bcce7fd8 ctx 0x7fc8bcf945b0 sn [first.my-domain.com])
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_domain.c:724]:
sr_ssl_ctx_info_callback(): SSL handshake started
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_domain.c:927]:
tls_server_name_cb(): SSL_get_servername returned NULL: return SSL_TLSEXT_ERR_NOACK
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/tcp_main.c:2460]: tcpconn_do_send(): sending...
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/tcp_main.c:2494]: tcpconn_do_send(): after real write: c= 0x7fc8bd364eb0 n=2376
fd=12
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/tcp_main.c:2495]: tcpconn_do_send(): buf=
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/io_wait.h:380]: io_watch_add(): DBG: io_watch_add(0xa92cc0, 12, 2, 0x7fc8bd364eb0),
fd_no=1
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: ERROR: tls [tls_util.h:42]:
tls_err_ret(): TLS accept:error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown
ca
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: ERROR: <core>
[core/tcp_read.c:1485]: tcp_read_req(): ERROR: tcp_read_req: error reading - c:
0x7fc8bd364eb0 r: 0x7fc8bd364f30
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/io_wait.h:602]: io_watch_del(): DBG: io_watch_del (0xa92cc0, 12, -1, 0x10) fd_no=2
called
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/tcp_read.c:1664]: release_tcpconn(): releasing con 0x7fc8bd364eb0, state -2, fd=12,
id=1 ([office_with_phones_public_ip_address]:53873 ->
[office_with_phones_public_ip_address]:5061)
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: <core>
[core/tcp_read.c:1665]: release_tcpconn(): extra_data 0x7fc8bd168508
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: <core>
[core/tcp_main.c:3308]: handle_tcp_child(): reader response= 7fc8bd364eb0, -2 from 0
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9354]: DEBUG: tls [tls_server.c:667]:
tls_h_close(): Closing SSL connection 0x7fc8bd168508
```
10-th line in each output from above shows that last server role which is configured for
particular socket is used to establish connection, ignoring previous ones. Please let me
know if my configuration is correct or it needs to be adjusted.
Thank you very much!
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https://github.com/kamailio/kamailio/issues/1574
25 Jun
25 Jun
2:50 p.m.
The issue seems to be the client implementation not providing server name indication.
The way it works is finding first a server profile by matching the ip and port (which is
not actually used at that moment) and registering a callback for SNI, which is executed
and searches for a profile matching the server_name. However, there is no SNI from the
client based on the last log message next:
```
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_server.c:199]:
tls_complete_init(): completing tls connection initialization
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_server.c:228]:
tls_complete_init(): Using initial TLS domain TLSs<172.16.30.205:5061> (dom
0x7fc8bcce7fd8 ctx 0x7fc8bcf945b0 sn [first.my-domain.com])
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_domain.c:724]:
sr_ssl_ctx_info_callback(): SSL handshake started
Jun 25 15:43:51 kamailio-dev /usr/sbin/kamailio[9344]: DEBUG: tls [tls_domain.c:927]:
tls_server_name_cb(): SSL_get_servername returned NULL: return SSL_TLSEXT_ERR_NOACK
```
So, SSL_get_servername() didn't returned a server name from the SSL context, meaning
that the client didn't provide any.
Can you try with s_client from openssl, something like:
```
openssl s_client -servername myservername.com -tlsextdebug -connect mykamailio.ip:5061
```
and watch the logs to see what is printed there?
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26 Jun
26 Jun
7:51 a.m.
Hello Daniel-Constantin,
You are right. It does not look like any of my test phones is capable of setting TLS
extension servername. I wonder if there are any at all.
I did series of tests with `openssl s_client -servername ...` command from different
machine and everything works as you described.
Thank you for guidance!
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6:12 p.m.
OK. No sip client with sni coming in my mind now, maybe you can ask on sr-users mailing
list.
I am closing this one.
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6:12 p.m.
Closed #1574.
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2181
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participants (2)
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Daniel-Constantin Mierla -
VolodyaIvanets