tftp-proxy(8) [freebsd man page]

TFTP-PROXY(8)						    BSD System Manager's Manual 					     TFTP-PROXY(8)

NAME

     tftp-proxy -- Internet Trivial File Transfer Protocol proxy

SYNOPSIS

     tftp-proxy [-v] [-w transwait]

DESCRIPTION

     tftp-proxy is a proxy for the Internet Trivial File Transfer Protocol invoked by the inetd(8) internet server.  TFTP connections should be
     redirected to the proxy using the pf(4) rdr command, after which the proxy connects to the server on behalf of the client.

     The proxy establishes a pf(4) rdr rule using the anchor facility to rewrite packets between the client and the server.  Once the rule is
     established, tftp-proxy forwards the initial request from the client to the server to begin the transfer.	After transwait seconds, the pf(4)
     NAT state is assumed to have been established and the rdr rule is deleted and the program exits.  Once the transfer between the client and
     the server is completed, the NAT state will naturally expire.

     Assuming the TFTP command request is from $client to $server, the proxy connected to the server using the $proxy source address, and $port is
     negotiated, tftp-proxy adds the following rule to the anchor:

	   rdr proto udp from $server to $proxy port $port -> $client

     The options are as follows:

     -v      Log the connection and request information to syslogd(8).

     -w transwait
	     Number of seconds to wait for the data transmission to begin before removing the pf(4) rdr rule.  The default is 2 seconds.

CONFIGURATION

     To make use of the proxy, pf.conf(5) needs the following rules.  The anchors are mandatory.  Adjust the rules as needed for your configura-
     tion.

     In the NAT section:

	   nat on $ext_if from $int_if -> ($ext_if:0)

	   no nat on $ext_if to port tftp

	   rdr-anchor "tftp-proxy/*"
	   rdr on $int_if proto udp from $lan to any port tftp -> 
	       127.0.0.1 port 6969

     In the filter section, an anchor must be added to hold the pass rules:

	   anchor "tftp-proxy/*"

     inetd(8) must be configured to spawn the proxy on the port that packets are being forwarded to by pf(4).  An example inetd.conf(5) entry fol-
     lows:

	   127.0.0.1:6969  dgram   udp	   wait    root 
		   /usr/libexec/tftp-proxy tftp-proxy

SEE ALSO

     tftp(1), pf(4), pf.conf(5), ftp-proxy(8), inetd(8), syslogd(8), tftpd(8)

CAVEATS

     tftp-proxy chroots to /var/empty and changes to user ``proxy'' to drop privileges.

BSD
								 November 28, 2005							       BSD

ssh-http-proxy-connect(1)					   User Commands					 ssh-http-proxy-connect(1)

NAME

       ssh-http-proxy-connect - Secure Shell proxy for HTTP

SYNOPSIS

       /usr/lib/ssh/ssh-http-proxy-connect [-h http_proxy_host]
	    [-p http_proxy_port] connect_host connect_port

DESCRIPTION

       A  proxy command for ssh(1) that uses HTTP CONNECT. Typical use is where connections external to a network are only allowed via a proxy web
       server.

OPTIONS

       The following options are supported:

       -h http_proxy_host    Specifies the proxy web server through which to connect. Overrides the HTTPPROXY and http_proxy environment variables
			     if they are set.

       -p http_proxy_port    Specifies the port on which the proxy web server runs. If not specified, port 80 is assumed. Overrides the HTTPPROXY-
			     PORT and http_proxy environment variables if they are set.

OPERANDS

       The following operands are supported:

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

       http_proxy_port	  The numeric port number to connect to on http_proxy_host.

       connect_host	  The name of the remote host to which the proxy web server is to connect you.

       connect_port	  The numeric port number of the proxy web server to connect you to on http_proxy_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-http-proxy-connect in ssh_config(4) when the proxy is set from the environment:

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

       Example 2 Overriding proxy environment variables

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

	 Host playtime.foo.com
	     ProxyCommand /usr/lib/ssh/ssh-http-proxy-connect -h webcache 
		 -p 8080 playtime.foo.com 22

       Example 3 Using the command line

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

	 example$ ssh -o'ProxyCommand="/usr/lib/ssh/ssh-http-proxy-connect 
	     -h webcache -p 8080 playtime.foo.com 22"' playtime.foo.com

ENVIRONMENT VARIABLES

       HTTPPROXY	Takes the http_proxy_host operand to specify the default proxy host. Overrides http_proxy if both are set.

       HTTPPROXYPORT	Takes the http_proxy_port operand to specify the default proxy port. Ignored if HTTPPROXY is not set.

       http_proxy	URL format for specifying proxy host and 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		     |SUNWsshu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ssh(1), ssh-socks5-proxy-connect(1), ssh_config(4), attributes(5)

SunOS 5.11							    24 Oct 2001 					 ssh-http-proxy-connect(1)