ssh-socks5-proxy-connect(1)

Name

ssh-socks5-proxy-connect - Secure Shell proxy for SOCKS5

Synopsis

/usr/lib/ssh/ssh-socks5-proxy-connect 
     [-h socks5_proxy_host] 
     [-p socks5_proxy_port] connect_host connect_port

Description

A proxy command for ssh(1) that uses SOCKS5 (RFC 1928). Typical use is where connections external to a network are only allowed via a socks gateway server.

This proxy command does not provide any of the SOCKS5 authentication mechanisms defined in RFC 1928. Only anonymous connections are possible.

Options

The following options are supported:

–h socks5_proxy_host

Specifies the proxy web server through which to connect. Overrides the SOCKS5_SERVER environment variable.

–p socks5_proxy_port

Specifies the port on which the proxy web server runs. If not specified, port 80 is assumed. Overrides the SOCKS5_PORT environment variable.

Operands

The following operands are supported:

socks5_proxy_host

The host name or IP address (IPv4 or IPv6) of the proxy.

socks5_proxy_port

The numeric port number to connect to on socks5_proxy_host.

connect_host

The name of the remote host to which the socks gateway is to connect you.

connect_port

The numeric port number of the socks gateway to connect you to on connect_host.

Examples

The recommended way to use a proxy connection command is to configure the ProxyCommand in ssh_config(4) (see Example 1 and Example 2). Example 3 shows how the proxy command can be specified on the command line when running ssh(1).

Example 1 Setting the proxy from the environment

The following example uses ssh-socks5-proxy-connect in ssh_config(4) when the proxy is set from the environment:

Host playtime.foo.com
    ProxyCommand /usr/lib/ssh/ssh-socks5-proxy-connect \
        playtime.foo.com 22

Example 2 Overriding proxy environment variables

The following example uses ssh-socks5-proxy-connect in ssh_config(4) to override (or if not set) proxy environment variables:

Host playtime.foo.com
    ProxyCommand /usr/lib/ssh/ssh-socks5-proxy-connect -h socks-gw \
        -p 1080 playtime.foo.com 22

Example 3 Using the command line

The following example uses ssh-socks5-proxy-connect from the ssh(1) command line:

example$ ssh -o'ProxyCommand=/usr/lib/ssh/ssh-socks5-proxy-connect \
    -h socks-gw -p 1080 playtime.foo.com 22' playtime.foo.com

Environment Variables

SOCKS5_SERVER

Takes socks5_proxy_host operand to specify the default proxy host.

SOCKS5_PORT

Takes socks5_proxy_port operand to specify the default proxy port.

Exit Status

The following exit values are returned:

0

Successful completion.

1

An error occurred.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE ATTRIBUTE VALUE Availability network/ssh Interface Stability Committed

See also

ssh(1), ssh-http-proxy-connect(1), ssh_config(4), attributes(5)