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ucspi-proxy(1) [debian man page]

ucspi-proxy(1)						      General Commands Manual						    ucspi-proxy(1)

ucspi-proxy - Copy data between a UCSPI client and server SYNOPSIS
ucspi-proxy [ -v ] [ -t TIMEOUT ] [ HOST PORT ] DESCRIPTION
This program is a simple loop copying data from a UCSPI server (file descriptor 0) to a client, and from a client to a server (FD 1). If either socket closes, ucspi-proxy exits. The other ucspi-proxy-* programs are based on this simple loop and have similar usage. If HOST and PORT are given on the command line, ucspi-proxy will make a TCP connection with the given parameters. If neither are present, ucspi-proxy will use file descriptor 6 for the client socket, as provided by UCSPI client programs. OPTIONS
-t TIMEOUT When making an connection, ucspi-proxy will wait a maximum of TIMEOUT seconds before giving up. Defaults to 30. -v Print messages about errors and byte counts. Without this option, ucspi-proxy is silent. RETURN VALUE
Exits 0 if a normal end of file was reached on one of the sockets. Otherwise it exits 1. SEE ALSO
ucspi-unix, ucspi-tcp ucspi-proxy(1)

Check Out this Related Man Page

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

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 -> 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: 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
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