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multipurpose relay for bidirectional data transfer

Socat (for SOcket CAT) establishes two bidirectional byte streams and transfers data between them. Data channels may be files, pipes, devices (terminal or modem, etc.), or sockets (Unix, IPv4, IPv6, raw, UDP, TCP, SSL). It provides forking, logging and tracing, different modes for interprocess communication and many more options.

It can be used, for example, as a TCP relay (one-shot or daemon), as an external socksifier, as a shell interface to Unix sockets, as an IPv6 relay, as a netcat and rinetd replacement, to redirect TCP-oriented programs to a serial line, or to establish a relatively secure environment (su and chroot) for running client or server shell scripts inside network connections. Socat supports sctp as of 1.7.0.

Package version:


The Debian version of SoCat differs from the upstream when handling long address
names for UNIX sockets. Instead of truncating the pathname and continuing, it will
instead produce an error message and stop. 

 -- Chris Taylor <>  Mon, 15 Mar 2010 23:29:08 +0000


David Acker has patched socat to add OpenSSL FIPS.
See and for more information.

The patch that is integrated into socat 1.5 does the following:

Add support for LDFLAGS in Makefile.  LDFLAGS can be specified on the
configure command line and then will be carried over into the make.

Add fips support.  Requires



socat is a relay for bidirectional data transfer between two independent data
channels. Each of these data channels may be a file, pipe, device (serial line
etc. or a pseudo terminal), a socket (UNIX, IP4, IP6 - raw, UDP, TCP), an
SSL socket, proxy CONNECT connection, a file descriptor (stdin etc.), the GNU
line editor (readline), a program, or a combination of two of these. 
These m


Q: What is the clue of socat?

A: socat probably doesn't have any clue. It is more an attempt to sm


socat(1)                                                    socat(1)

       socat - Multipur


socat ( unstable; urgency=low

  * New upstream release.
  * Upstream release fixes CVE-20


####################### V

	fixed a stack overflow vulnerability that occurred w


This work was packaged for Debian by:

    Chris Taylor <> on Wed, 10 Feb 2010 14:

Browse inside socat_1.7.1.3-1_ia64.deb

         [DIR]DEBIAN/ (2)  65535+ mirrors
         [DIR]usr/ (2)  65535+ mirrors

Download socat_1.7.1.3-1_ia64.deb

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