171 lines
3.3 KiB
HTML
171 lines
3.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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><HEAD
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><TITLE
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>What is IP Masquerade?</TITLE
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><META
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NAME="GENERATOR"
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CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
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REL="HOME"
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TITLE="Linux IP Masquerade HOWTO"
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HREF="index.html"><LINK
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REL="UP"
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TITLE="Background Knowledge"
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HREF="ipmasq-background2.0.html"><LINK
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REL="PREVIOUS"
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TITLE="Background Knowledge"
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HREF="ipmasq-background2.0.html"><LINK
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REL="NEXT"
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TITLE="Current Status"
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HREF="ipmasq-background2.2.html"></HEAD
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><BODY
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CLASS="SECT1"
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BGCOLOR="#FFFFFF"
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TEXT="#000000"
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LINK="#0000FF"
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VLINK="#840084"
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ALINK="#0000FF"
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><DIV
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CLASS="NAVHEADER"
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><TABLE
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SUMMARY="Header navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TH
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COLSPAN="3"
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ALIGN="center"
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>Linux IP Masquerade HOWTO</TH
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></TR
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><TR
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><TD
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WIDTH="10%"
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ALIGN="left"
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VALIGN="bottom"
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><A
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HREF="ipmasq-background2.0.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="80%"
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ALIGN="center"
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VALIGN="bottom"
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>Chapter 2. Background Knowledge</TD
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><TD
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WIDTH="10%"
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ALIGN="right"
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VALIGN="bottom"
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><A
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HREF="ipmasq-background2.2.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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></TABLE
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><HR
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ALIGN="LEFT"
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WIDTH="100%"></DIV
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><DIV
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CLASS="SECT1"
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><H1
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CLASS="SECT1"
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><A
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NAME="IPMASQ-BACKGROUND2.1"
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></A
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>2.1. What is IP Masquerade?</H1
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><P
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>IP Masquerade is a networking function in Linux similar to the one-to-many
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(1:Many) NAT (Network Address Translation) servers found in many commercial
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firewalls and network routers. For example, if a Linux host is connected to
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the Internet via PPP, Ethernet, etc., the IP Masquerade feature allows other
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"internal" computers connected to this Linux box (via PPP, Ethernet, etc.) to
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also reach the Internet as well. Linux IP Masquerading allows for this
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functionality even though these internal machines don't have
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<STRONG
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>an officially assigned IP address</STRONG
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>. </P
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><P
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>MASQ allows a set of machines to <STRONG
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>invisibly</STRONG
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>
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access the Internet via the MASQ gateway. To other machines on the Internet,
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the outgoing traffic will appear to be from the IP MASQ Linux server itself.
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In addition to the added functionality, IP Masquerade provides the foundation
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to create a HEAVILY secured networking environment. With a well built firewall,
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breaking the security of a well configured masquerading system and internal
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LAN should be considerably difficult to accomplish. </P
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><P
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>If you would like to know more on how MASQ (1:Many) differs from 1:1 (true) NAT
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and Proxy solutions, please see the <A
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HREF="what-is-masq.html"
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>Section 7.6</A
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> FAQ entry.</P
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></DIV
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><DIV
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CLASS="NAVFOOTER"
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><HR
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ALIGN="LEFT"
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WIDTH="100%"><TABLE
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SUMMARY="Footer navigation table"
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WIDTH="100%"
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BORDER="0"
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CELLPADDING="0"
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CELLSPACING="0"
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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><A
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HREF="ipmasq-background2.0.html"
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ACCESSKEY="P"
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>Prev</A
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></TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="index.html"
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ACCESSKEY="H"
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>Home</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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><A
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HREF="ipmasq-background2.2.html"
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ACCESSKEY="N"
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>Next</A
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></TD
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></TR
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><TR
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><TD
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WIDTH="33%"
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ALIGN="left"
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VALIGN="top"
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>Background Knowledge</TD
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><TD
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WIDTH="34%"
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ALIGN="center"
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VALIGN="top"
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><A
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HREF="ipmasq-background2.0.html"
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ACCESSKEY="U"
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>Up</A
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></TD
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><TD
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WIDTH="33%"
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ALIGN="right"
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VALIGN="top"
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>Current Status</TD
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></TR
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></TABLE
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></DIV
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></BODY
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></HTML
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> |