[squid-users] Reverse proxy for HTTPS cloudfront server

[Philip Munaawa]

openssl test to reproduce the error:

openssl s_client  -connect www.coursera.org:443 - FAILS (Testing with
cousera since it is also hosted on cloudfront, and uses TLS/SNI)

CONNECTED(00000003)
140225331586752:error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3
alert handshake failure:s23_clnt.c:757:

openssl s_client  -connect www.coursera.org:443 -servername www.coursera.org
- SUCCEEDS



Also, with nginx, if I switch off the proxy_ssl_server_name flag, I get the
same openssl error as squid,

2017/02/14 09:20:39 [error] 23604#0: *6 SSL_do_handshake() failed (SSL:
error:14077410:SSL routines:SSL23_GET_SERVER_HELLO:sslv3 alert handshake
failure) while S
SL handshaking to upstream,..."

This makes me suspect that squid is not sending the servername ...



On 14 February 2017 at 02:40, Amos Jeffries <squid3 at treenet.co.nz> wrote:

> On 14/02/2017 4:40 a.m., Philip Munaawa wrote:
> > I am trying to reverse proxy a site hosted on cloudfront, using the
> normal
> > https_port accel. I have the key/cert pair for the origin. The cloudfront
> > uses TLS/SNI to negotiate an SSL connection. However, when I try to
> connect
> > through the proxy, I get the error below in the logs:
> >
> > Error negotiating SSL on FD 39: error:14094410:SSL
> > routines:SSL3_READ_BYTES:sslv3 alert handshake failure (1/0/0)
> >
> > I have seen a similar issie with nginx, which was resolved by adding a
> > switch to send the server_host_name. see:
> > http://stackoverflow.com/questions/25329941/nginx-
> caching-proxy-fails-with-ssl23-get-server-hellosslv3-alert-handshake-fail
> >
> > Does squid (3.5.24) have a similar switch/functionality?
> >
>
> The only thing that SSL23_SERVER_HELLO and SSL3_READ_BYTES have in
> common is that they are errors. So no they are not "similar".
>
> The server is closing the connection without reporting what the problem
> actually is. Squid-3.5 should already be sending SNI using the
> cache_peer hostname or request-URL hostname.
>
> <http://openssl.6102.n7.nabble.com/error-14094410-SSL-
> routines-SSL3-READ-BYTES-sslv3-alert-handshake-failure-td12398.html>
> has some hints from Dave Thompson on how to find out what is going on
> with the server.
>
> Amos
>
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>
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