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locks; strict;
comment	@# @;


1.2
date	2013.11.14.08.01.01;	author apb;	state Exp;
branches;
next	1.1;
commitid	rQxVWo4kZNVACddx;

1.1
date	2010.07.31.17.04.47;	author apb;	state Exp;
branches;
next	;


desc
@@


1.2
log
@Update COMMENT and DESCR to describe new features added between
sslh-1.7a and 1.15.
@
text
@Sslh accepts connections on specified ports, and forwards
them further based on tests performed on the first data
packet sent by the remote client.

Probes for HTTP, SSL, SSH, OpenVPN, tinc, XMPP are
implemented, and any other protocol that can be tested using
a regular expression, can be recognised. A typical use case
is to allow serving several services on port 443 (e.g. to
connect to ssh from inside a corporate firewall, which
almost never block port 443) while still serving HTTPS on
that port.

Hence sslh acts as a protocol demultiplexer, or a
switchboard. Its name comes from its original function to
serve SSH and HTTPS on the same port.
@


1.1
log
@Add sslh-1.7a.

sslh lets one accept both HTTPS and SSH connections on the same port.
@
text
@d1 3
a3 5
sslh lets one accept both HTTPS and SSH connections on
the same port. It makes it possible to connect to an SSH
server on port 443 (e.g. from inside a corporate firewall,
which almost never block port 443) while still serving HTTPS
on that port.
d5 7
a11 4
The idea is to have sslh listen to the external 443 port,
accept the incoming connections, work out what type of
connection it is, and then fordward to the appropriate
server.
d13 3
a15 8
The protocol detection is made based on a small difference
between SSL and SSH: an SSL client connecting to a server
speaks first, whereas an SSH client expects the SSH server
to speak first (announcing itself with a banner). sslh
waits for some time for the incoming connection to send data.
If it does before the timeout occurs, it is supposed to be
an SSL connection. Otherwise, it is supposed to be an SSH
connection.
@