Thanks! That did the trick (Debian 10)
[server:default] method = TLSv1.2+ verify_certificate = yes require_certificate = yes private_key = /etc/kamailio/tls/myserver.key certificate = /etc/kamailio/tls/myserver.crt # Points to your root CA list ca_list = /etc/ssl/certs/ca-certificates.crt
[client:default] method = TLSv1.2+ verify_certificate = yes require_certificate = yes private_key = /etc/kamailio/tls/myserver.key certificate = /etc/kamailio/tls/myserver.crt ca_list = /etc/kamailio/tls/issuer.crt
Now takes longer to reload TLS config and need to increase PKG/SHM size to process full list, but it's ok )
On 29.03.2020 13:54, Alexey Vasilyev wrote:
Hi Igor,
Because these errors about verification of Microsoft certificate. /etc/kamailio/tls/issuer.cer should contain certificate authorities list, which contains trusted root certificates. For example, for CentOS7 /etc/ssl/certs/ca-bundle.crt
Alexey Vasilyev alexei.vasilyev@gmail.com mailto:alexei.vasilyev@gmail.com
29 Mar 2020, в 11:36, Igor Olhovskiy <igorolhovskiy@gmail.com mailto:igorolhovskiy@gmail.com> написал(а):
Hi!
Actually I’m trying to get Kamailio to work as MS Teams SBC following by perfect article https://skalatan.de/en/blog/kamailio-sbc-teams It works well, but one thing is bothering me. I’m using Let’sEncrypt certs (actually, works well), but with setting in *tls.conf*
verify_certificate = yes require_certificate = yes
It’s giving an errors like
/usr/sbin/kamailio[4551]: ERROR: tls [tls_util.h:42]: tls_err_ret(): TLS write:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed /usr/sbin/kamailio[4551]: ERROR: <core> [core/tcp_read.c:1505]: tcp_read_req(): ERROR: tcp_read_req: error reading - c: 0x7f03e6d23d88 r: 0x7f03e6d23e08 (-1)
They are resolved with setting these settings (verify/require) to off (actually, as mentioned here - https://www.fredposner.com/1836/kamailio-tls-and-letsencrypt/), but I’m really curious - why?
As I got, it’s using *openssl verify* on a background, but this check locally passed with
openssl verify -CAfile issuer.crt myserver.crt myserver.crt: OK
So, is there any tricks to lets encrypt or just some misconfig in *tls.cfg*?
Now it looks like one from article
[server:default] method = TLSv1.2+ verify_certificate = yes require_certificate = yes private_key = /etc/kamailio/tls/myserver.key certificate = /etc/kamailio/tls/myserver.crt ca_list = /etc/kamailio/tls/issuer.crt
[client:default] method = TLSv1.2+ verify_certificate = yes require_certificate = yes private_key = /etc/kamailio/tls/myserver.key certificate = /etc/kamailio/tls/myserver.crt ca_list = /etc/kamailio/tls/issuer.crt — Regards, Igor
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