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-How to setup FTP proxying using the built in proxy code.
-========================================================
-
-NOTE: Currently, the built-in FTP proxy is only available for use with NAT
- (i.e. only if you're already using "map" rules with ipnat). It does
- support null-NAT mappings, that is, using the proxy without changing
- the addresses.
-
-Lets assume your network diagram looks something like this:
-
-
-[host A]
- |a
----+-------------+----------
- |b
- [host B]
- |c
----+-------------+----------
- |d
-[host C]
-
-and IP Filter is running on host B. If you want to proxy FTP from A to C
-then you would do:
-
-map int-c ipaddr-a/32 -> ip-addr-c-net/32 proxy port ftp ftp/tcp
-
-int-c = name of "interface c"
-ipaddr-a = ip# of interface a
-ipaddr-c-net = another ip# on the C-network (usually not the same as the
-interface).
-
-e.g., if host A was 10.1.1.1, host B had two network interfaces ed0 and vx0
-which had IP#'s 10.1.1.2 and 203.45.67.89 respectively, and host C was
-203.45.67.90, you would do:
-
-map vx0 10.1.1.1/32 -> 203.45.67.91/32 proxy port ftp ftp/tcp
-
-where:
-ipaddr-a = 10.1.1.1
-int-c = vx0
-ipaddr-c-net = 203.45.67.91
-
-The "map" rule for this proxy should precede any other NAT rules you are
-using.
-
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