From owner-freebsd-net  Thu Jun 17 17:54:20 1999
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Date: Thu, 17 Jun 1999 17:54:16 -0700 (PDT)
Reply-To: Jonathan Hanna <pangolin@home.com>
Organization: Pangolin Systems
From: Jonathan Hanna <pangolin@home.com>
To: freebsd-net@freebsd.org
Subject: natd, libalias, and PKT_ALIAS_REVERSE
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I tried natd -reverse and got a core dump due to infinite recursion.

alias.c in libalias has this rather amusing code:

int 
PacketAliasIn(char *ptr, int maxpacketsize)
{   
    struct in_addr alias_addr;
    struct ip *pip;
    int iresult;
    
    if (packetAliasMode & PKT_ALIAS_REVERSE) 
        return PacketAliasOut(ptr, maxpacketsize);
...

int 
PacketAliasOut(char *ptr,           /* valid IP packet */
               int  maxpacketsize   /* How much the packet data may grow
                                       (FTP and IRC inline changes) */
              )
{   
    int iresult;
    struct in_addr addr_save;
    struct ip *pip;
    
    if (packetAliasMode & PKT_ALIAS_REVERSE)
        return PacketAliasIn(ptr, maxpacketsize);
...

I noticed also that PKT_ALIAS_REVERSE is not documented int libalias.3. 


What I actually want do to is redirect connections from my internal network
to a certain external host to an ssh port (on 127.0.0.1). What's a good way
of doing this?

This is on reasonably up to date current and 3.2 stable.

Jonathan Hanna <pangolin@home.com>



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