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Special Forums IP Networking Proxy Server Httpd proxy on AIX: failed to connect SSL Post 303042274 by trifo75 on Friday 20th of December 2019 04:05:21 AM
Old 12-20-2019
Httpd proxy on AIX: failed to connect SSL

Hi,

I am trying to migrate a quite old proxy server with Apache httpd, running on AIX
The scenario is that my server accepts connections on http and proxies them to an SSL backend. This is done in a ProxyPass statement, as follows:
Code:
ProxyPass /myservice/my-ws https://mybackend.mycompany.com/app/myservice

When I try to access this service, I get an internal server error and there is an entry in the error log:
Code:
[Fri Dec 20 08:51:53.194111 2019] [proxy:error] [pid 20250630:tid 6683] AH00961: HTTPS: failed to enable ssl support for 10.148.0.139:443 (mybackend.mycompany.com)

The httpd version is 2.4.39 (perzl.org), running on AIX 7.1
I suspect that I would need to install CA certificates to be able to establish SSL connection, however the default value for SSLVerifyCert is none.

Tried to set the logging to higher value, but no relevant info came up (LogLevel was set from warn to debug). Is there a way to produce some more detailed log on this type of ssl handshake?

Thanks,
--Trifo
 
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SSLH(1p)						User Contributed Perl Documentation						  SSLH(1p)

NAME
sslh - Switch incoming connection between SSH and SSL/HTTPS servers SYNOPSIS
sslh [ -v ] [ -p [host:]port ] [ -t timeout ] [ --ssh [host:]port ] [ --ssl [host:]port ] DESCRIPTION
sslh is a simple script that lets you switch an incoming connection on a single port between distinct SSH and SSL/HTTPS servers. sslh listens for connections on a port and is able to redirect them either to an HTTPS web server or a SSH server. This lets one setup both a HTTPS web server and a SSH server and access them through the same host+port. OPTIONS
The program follows the usual GNU command line syntax, with long options starting with two dashes. -p, --port [host:]port The port the proxy will listen to. If no port is given, 443 is used by default. If no host is given, "localhost" is used by default. -s, --ssh [host:]port The SSH server which the SSH connections must be forwarded to. If omitted, the default is localhost:22. -l, --ssl, --https [host:]port The HTTPS server which the HTTPS connections must be forwarded to. If omitted, the default is localhost:443. -t, --timeout delay Timeout in seconds before a silent incoming connection is considered as a SSH connection. The number can be fractional. The default is 2seconds. -v, --verbose Verbose output. This option can be used several times for more verbose output. EXAMPLE OF USE
Is this tool actually useful? Yes. For example one can use it to access both a SSH server and a secure web server via a corporate proxy that only accepts to relay connections to port 443. Creating a tunnel that passes SSH connection through a CONNECT-enabled web proxy is easy with connect-tunnel (also included in the "Net::Proxy" distribution). The proxy will let both SSH and HTTPS connections out (since they all point to port 443), and the home server will connect those incoming connections to the appropriate server. This only requires to run the HTTPS server on a non standard port (not 443). TECHNICAL NOTE
How can this proxy find out what kind of protocol is using a TCP connection to port 443, without being connected (yet) to the server? We actually rely on a slight difference between the SSL and SSH protocols (found thanks to ethereal): SSH Once the TCP connection is established, the server speaks first, presenting itself by saying something like: SSH-2.0-OpenSSH_3.6.1p2 Debian 1:3.6.1p2-1 SSL With SSL, it's always the client that speaks first. This means that sslh can be used with any pair of protocols/services that share this property (the client speaks first for one and the server speaks first for the other). AUTHORS
Original idea and C version Frederic Ple "<sslh@wattoo.org>". Perl versions Philippe 'BooK' Bruhat "<book@cpan.org>". SCRIPT HISTORY
Version 0.01 of the script was a quick hack designed in 2003 as a proof of concept. Version 0.02 (and higher) are based on "Net::Proxy", and included with the "Net::Proxy" distribution. Version 0.02 didn't work, though. Version 0.03 correctly initialised the "in" connector. Version 0.04 lets the proxy listen on any address (instead of "localhost", which is still the default). Thanks to Dieter Voegtli for spotting this. SEE ALSO
Net::Proxy, Net::Proxy::Connector::dual. COPYRIGHT
Copyright 2003-2006, Philippe Bruhat. All rights reserved. LICENSE
This module is free software; you can redistribute it or modify it under the same terms as Perl itself. perl v5.10.1 2009-10-18 SSLH(1p)

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