[LUAU] Email & Proxy Server question

Rodney Kanno pepe65 at hawaii.rr.com
Tue Mar 8 22:14:57 PST 2005


Thanks! I'll pick up "Building Internet Firewalls" and hopefully I can 
find a solution to my "problem." Thanks for all you help / explanations!

Rodney


Vince Hoang wrote:

>On Tue, Mar 08, 2005 at 02:30:43PM -1000, pepe65 at hawaii.rr.com wrote: 
>  
>
>>I have tried turning off my firewall completely, and I still
>>cannot get out. I have found that if I turn on IP forwarding
>>/ masquerading, everything works just fine. However, with IP
>>forwarding / masquerading on, I found that one could still
>>access the internet if they disabled the proxy server setting
>>on the Windows box. If possible I would like internet access
>>"disabled" if someone turns off the proxy server settings on
>>the Windows box. If I change the gateway back to the original
>>settings (our main router), then everything works fine.
>>    
>>
>
>Your message made it sound like you could not hit tcp/25 and
>tcp/110 on the Linux box. If you are trying to hit those ports on
>an external server, then yes, you will need to enable NAT on the
>box.
>
>My original suggestion does not change, however. Make sure you
>open up the necessary ports and leave the rest off. Web access
>gets through because by default, you let everything out. Be sure
>to move your router to a different physical segment.
>
>I would recommend picking up Zwicky's _Building Internet Firewalls_.
>
>-Vince
>_______________________________________________
>LUAU at lists.hosef.org mailing list
>http://lists.hosef.org/cgi-bin/mailman/listinfo/luau
>
>
>  
>


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