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howtos:misc:proxying_smtp [2015/11/27 23:54 (UTC)]
louigi600 [Scenario 3]
howtos:misc:proxying_smtp [2016/06/20 07:28 (UTC)] (current)
alienbob proxying_smtp renamed to howtos:misc:proxying_smtp (Ended up in the wrong namespace)
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 Here are some scenarios with examples on how you could go about working around the problem. Here are some scenarios with examples on how you could go about working around the problem.
  
-Throughout the scenarios we will be referring so 3 machines:+Throughout the scenarios we will be referring to 3 machines:
  
   * Machine A with IP address 192.168.0.2 (cannot send mails directly via internet and cannot relay on Local Mail Relay)   * Machine A with IP address 192.168.0.2 (cannot send mails directly via internet and cannot relay on Local Mail Relay)
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   DATA   DATA
   354 End data with <CR><LF>.<CR><LF>   354 End data with <CR><LF>.<CR><LF>
-  FROM:drao@invallee.it +  FROM:me@localnet.com 
-  TO:drao@invallee.it+  TO:dude@localnet.com
   SUBJECT:test using ssh tunnel   SUBJECT:test using ssh tunnel
   if you get this sending email trough ssh tunnel worked   if you get this sending email trough ssh tunnel worked
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   DATA   DATA
   354 End data with <CR><LF>.<CR><LF>   354 End data with <CR><LF>.<CR><LF>
-  FROM:drao@invallee.it +  FROM:me@localnet.com 
-  TO:drao@invallee.it+  TO:dude@localnet.com
   SUBJECT:test using ssh tunnel   SUBJECT:test using ssh tunnel
   if you get this sending email trough ssh tunnel worked   if you get this sending email trough ssh tunnel worked
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 ====== NOTES ====== ====== NOTES ======
-The command we used above is probably a good example of bad unixcraft, let me give a brief explanation on how it works.+The command we used in Scenario 1 is probably a good example of bad unixcraft, let me give a brief explanation on how it works.
 Let's momentarely get rid of the odd use of the fifo by just using this: Let's momentarely get rid of the odd use of the fifo by just using this:
  
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 so now the whole command line looks like this: so now the whole command line looks like this:
   cat /tmp/f | nc -l -p 1234 -s 192.168.1.2 | nc 192.168.2.2 25 >> /tmp/f   cat /tmp/f | nc -l -p 1234 -s 192.168.1.2 | nc 192.168.2.2 25 >> /tmp/f
-it is possible to do the same thing without having to use cat it is a little neater but still bad unixcraft+it is possible to do the same thing without having to use catit is a little neater but still bad unixcraft
   nc -l  -p 1234 -s 192.168.1.2 < /tmp/f |nc 192.168.2.2 25 >> /tmp/f   nc -l  -p 1234 -s 192.168.1.2 < /tmp/f |nc 192.168.2.2 25 >> /tmp/f
  

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