At work I am behind a firewall that blocks the SSL POP port (995).  However, 
there are various other ports that are not blocked (e.g. 993).  What I would 
like to do is setup some sort of thingy on my home firewall that acts as a 
proxy for the POP server at my ISP.  I could then point my mail reader at port 
993 of my firewall and have it appear as though my firewall was the POP server 
at my ISP.  I have done this in the past with a few strategies including 
writing a custom proxy server and using the -L option of ssh(1).  I'm 
wondering if I could accomplish the same thing with iptables.  Has anyone any 
ideas?  I'm guessing I can use a combination of SNAT and DNAT, but I'm not 
sure if it would work because I see no examples of people using NAT to forward 
packets to a server that is external to their network.  Normally the server is 
inside their network.





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