Hello there. We're using pfsense and squid-proxy to bump https connections between some of our machines and www. The setup seems to works fine for most of the https sites, but it doesn't work for the others.
One example to this sites is "docs.docker.com". Even though we can connect to "docker.com", we can't connect to "docs.docker.com".
The error we get is:
(92) Protocol error (TLS code: SQUID_ERR_SSL_HANDSHAKE)
Handshake with SSL server failed: error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure
Upon further investigation we found out that this happens because some sites require SNI to supply correct SSL certificate.
You can test this out with:
-------------------------------
openssl s_client -connect docs.docker.com:443 -> ERROR
140612823746464:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake failure:s23_clnt.c:744:
-------------------------------
openssl s_client -connect docs.docker.com:443 -servername docs.docker.com -> Works
--------------------------------
Squid seems to make https request without the SNI. How can we configure Squid to use SNI? Thanks.
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