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Old 01-22-2004, 10:05 AM
Junior Member
  
Join Date: Jan 2004
Location: Germany
Posts: 12
Default DNAT/SNAT or Masq?
Hello,

at first i´m an astaro beginnner and my english is also not the best.

I have an IIS with 2Websites and an Exchange Server. From my ISP 4 external IPs. (Servers and Clients in the same Lan)

My Question: Which attitudes i need DSnat or Masq?

Can somebody help me?

SKY
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Old 01-22-2004, 11:41 AM
AMros's Avatar
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Join Date: Jan 2003
Location: Berlin/Germany
Posts: 308
Default Re: DNAT/SNAT or Masq?
take a look:
http://docs.astaro.org/guidebooks/Gu...web-server.pdf
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Old 01-22-2004, 12:00 PM
Wizard
  
Join Date: Jul 2003
Location: U.S.
Posts: 1,265
Default Re: DNAT/SNAT or Masq?
For an explanation of masquerading, see Re: What's the Secret?

DNAT is used to associate a "real" IP address with a private number. You can't access IP addresses that begin with 192, 172, 10 (so called "private" numbers) directly from the Internet (well you could, but all the routers of the Internet are not supposed to, because everybody agrees to abide by this rule, or Internet standard). So if you are using such numbers on your LAN, DNAT on a router (or routing firewall) translates all packets from a non-private (or 'real') address (that is, one not starting with 192, 172, 10...) to a private one on your LAN...
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Old 01-22-2004, 01:13 PM
Wizard
  
Join Date: Jul 2003
Location: U.S.
Posts: 1,265
Default Re: DNAT/SNAT or Masq?
By the way, this document is simpler:

A NAT course for newbies
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