Date: Tue, 26 Sep 2000 11:32:23 +0200 From: Hanspeter Roth Bsag <roth@bsag.ch> To: freebsd-net@freebsd.org Subject: ppp nat port/addr conflict Message-ID: <20000926113223.A28035@bs11.bsag.ch>
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Hello,
I'm trying to set up NAT to allow specific connections.
The participating hosts are connected as follows:
local client FreeBSD router remote host
1.0.0.2 <---> 1.0.0.1 2.0.0.1 <---> 2.0.0.2
ethernet ppp
The local client has to connect to the remote host but with
the router's address [1.0.0.2].
In the ppp.conf I have
nat addr 1.0.0.2 2.0.0.1
This allows telnet and ftp connections from the local client
[1.0.0.2] to the remote host [2.0.0.2].
(Interestingly I'm also able to connect to the remote host from
the router itself.)
Now I want a to allow a connection from the remote host to the
router at a specific port. Thus I tried
nat port tcp 2.0.0.1:6009 6009 127.0.0.1:6009
I'm aware that there is an address conflict since 2.0.0.1 is also
diverted to the local client [1.0.0.2] by the `nat addr' command.
I hoped that `nat port' would take precedence over `nat addr'.
But packets to 2.0.0.1:6009 get diverted to the local client as well.
Is there a means to resolve this conflict?
-Hanspeter
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