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📄 iptables 簡介.mht

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From: <由 Microsoft Internet Explorer 5 保存>
Subject: =?gb2312?B?aXB0YWJsZXMguoa96Q==?=
Date: Fri, 13 Aug 2004 16:55:43 +0800
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Content-Location: http://www.savs.hcc.edu.tw/~chuavv/articles/netfilter.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>iptables =C2=B2=A4=B6</TITLE>
<META content=3D"text/html; charset=3DBig5" http-equiv=3DContent-Type>
<META content=3D"MSHTML 5.00.3502.5390" name=3DGENERATOR></HEAD>
<BODY>
<H1>NetFilter=C2=B2=A4=B6</H1>
<P>Redhat Linux =
=A7=DE=B3N=C0=B3=A5=CE=A8t=A6C=AC=E3=B0Q=B7|<BR>Introduction to Linux =
Netfilter=B8=C9=A5R=B8=EA=AE=C6</P>
<P>=AB=ED=B6h=B8=EA=B0T=B1M=A5=F4=C1=BF=AEv</P>
<P>=B3=AF=A5=C3=AA@ (Cd Chen), <A=20
href=3D"mailto:cdchen@cdchen.idv.tw">cdchen@cdchen.idv.tw</A></P>
<P>2002/06/22</P>
<H2>=A4=B6=B2=D0</H2>
<P>=AC=B0=AE=D6=A4=DF=AA=BA=A4l=A8t=B2=CE=A1A=A5=CE=A8=D3=B9=EF=B3z=B3qLi=
nux=A5D=BE=F7=AA=BA=AB=CA=A5]=B8=EA=AE=C6=B6i=A6=E6=BFz=BF=EF=A1B=C2=E0=C4=
=B6=A9=CE=BC=D0=AA`=BBP=A7=EF=BCg=A1C=A6=D3iptables=ABh=ACO=A9=F1=B8m=A9=F3=
user=20
space=AA=BANetFilter=B2=D5=BAA=A4u=A8=E3=A1C</P>
<H2>=B5=FC=B7J</H2>
<P>=A5H=A4U=A4=B6=B2=D0=A4@=A8=C7NetFilter=A4=A4=B1`=A8=A3=AA=BA=A6W=B5=FC=
=A1G</P>
<H3>Rule (=B3W=ABh)</H3>
<P>=A5=CE=A8=D3=B2=D5=BAA=AB=CA=A5]=B9L=C2o=B3W=ABh=AA=BA=B3=E6=A6=EC=A1C=
=B1z=A5i=A5H=A8=CF=A5=CEiptables=A8=D3=B3]=A9w=B2=C5=A6X=AD=FE=A8=C7=B1=F8=
=A5=F3=AA=BA=AB=CA=A5]=A1A=B9=EF=A8=E4=A7@=AD=FE=A8=C7=B3B=B8m=B0=CA=A7@=A1=
C=A5i=A5H=B3]=A9w=AA=BA=B1=F8=A5=F3=A6p=A4U=A1G</P>
<TABLE border=3D1 cellPadding=3D0 cellSpacing=3D0>
  <TBODY>
  <TR>
    <TD bgColor=3D#cccccc width=3D156>
      <P><B>=A4=F1=B9=EF=B6=B5=A5=D8</B></P></TD>
    <TD bgColor=3D#cccccc width=3D394>
      <P><B>=BB=A1=A9=FA</B></P></TD></TR>
  <TR>
    <TD width=3D156>
      <P>Address</P></TD>
    <TD width=3D394>
      =
<P>=B0w=B9=EF=AB=CA=A5]=A4=BA=AA=BA=A6=EC=A7}=B8=EA=B0T=B6i=A6=E6=A4=F1=B9=
=EF=A1C=A5i=B9=EF=A8=D3=B7=BD=A6=EC=A7}(Source =
Address)=A1B=A5=D8=AA=BA=A6=EC=A7}(Destination Address)=20
      =BBP=BA=F4=B8=F4=A5d=A6=EC=A7}(MAC =
Address)=B6i=A6=E6=A4=F1=B9=EF=A1C</P></TD></TR>
  <TR>
    <TD width=3D156>
      <P>Port</P></TD>
    <TD width=3D394>
      <P><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=AB=CA=A5]=A4=BA=A6s=A9=F1=A9=F3</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">Transport</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=BCh=AA=BA</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">Port</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: =
AR-SA">=B8=EA=B0T=B3]=A9w=A4=F1=B9=EF=AA=BA=B1=F8=A5=F3=A1A=A5i=A5=CE=A8=D3=
=A4=F1=B9=EF=AA=BA</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">Port</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=B8=EA=B0T=A5]=A7t=A1G</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A8=D3=B7=BD</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">Port=20
      (Source Port)</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A1B=A5=D8=AA=BA</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">=20
      Port (Destination Port)</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A1C</SPAN></P></TD></TR>
  <TR>
    <TD width=3D156>
      <P>Protocol</P></TD>
    <TD width=3D394>
      <P><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: =
AR-SA">=B3q=B0T=A8=F3=A9w=A1A=AB=FC=AA=BA=ACO=ACY=A4@=BA=D8=AFS=AE=ED=BA=D8=
=C3=FE=AA=BA=B3q=ABH=A8=F3=A9w=A1C</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">NetFilter=20
      </SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A5i=A5H=A4=F1=B9=EF</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">TCP</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A1B</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">UDP</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A9=CE=AA=CC</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">ICMP</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=B5=A5=A8=F3=A9w=A1C</SPAN></P></TD></TR>
  <TR>
    <TD width=3D156>
      <P>Interface</P></TD>
    <TD width=3D394>
      =
<P>=A4=B6=AD=B1=A1A=AB=FC=AA=BA=ACO=AB=CA=A5]=B1=B5=A6=AC=A1A=A9=CE=AA=CC=
=BF=E9=A5X=AA=BA=BA=F4=B8=F4=A4=B6=AD=B1=A5d=A6W=BA=D9=A1C</P></TD></TR>
  <TR>
    <TD width=3D156>
      <P>Fragment</P></TD>
    <TD width=3D394>
      <P><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A4=A3=A6P</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">Network=20
      Interface</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: =
AR-SA">=AA=BA=BA=F4=B8=F4=A8t=B2=CE=A1A=B7|=A6=B3=A4=A3=A6P=AA=BA=AB=CA=A5=
]=AA=F8=AB=D7=AA=BA=AD=AD=A8=EE=A1C=A6p=AB=CA=A5]=B8=F3=B6V=A6=DC=A4=A3=A6=
P=AA=BA=BA=F4=B8=F4=A8t=B2=CE=AE=C9=A1A=A5i=AF=E0=B7|=B1N=AB=CA=A5]=B6i=A6=
=E6=B5=F4=A4=C1</SPAN><SPAN=20
      lang=3DEN-US=20
      style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">(Fragment)</SPAN><SPAN=20
      style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: =
AR-SA">=A1C=B1z=A5i=A5H=B0w=B9=EF=B5=F4=A4=C1=AB=E1=AA=BA=AB=CA=A5]=B8=EA=
=B0T=B6i=A6=E6=BA=CA=B1=B1=BBP=B9L=C2o=A1C</SPAN></P></TD></TR>
  <TR>
    <TD width=3D156>
      <P>Counter</P></TD>
    <TD width=3D394>
      =
<P>=A5i=B0w=B9=EF=AB=CA=A5]=AA=BA=ADp=BC=C6=B3=E6=A6=EC=B6i=A6=E6=B1=F8=A5=
=F3=A4=F1=B9=EF=A1C</P></TD></TR></TBODY></TABLE>
<P>PS=A1G=A5=CE=A8=D3=B2=D5=BAA=A4=F1=B9=EF=B3W=ABh=AA=BA=A4=E8=AAk=A1A=BD=
=D0=B0=D1=BE\<B>=AB=FC=A5O</B>=A4@=B8`=A1C</P>
<H3>Target (=B0=CA=A7@)</H3>
<P>=B7=ED=AB=CA=A5]=B3z=B3qLinux=AE=C9=A1ANetFilter=A4@=B5o=B2{=B8=D3=AB=CA=
=A5]=B2=C5=A6X=B3]=A9w=AA=BA=A4=F1=B9=EF=B3W=ABh=AE=C9=A1A=B7|=B9=EF=B8=D3=
=AB=CA=A5]=B6i=A6=E6=B3B=B2z=AA=BA=B0=CA=A7@=A1A=BA=D9=A4=A7=AC=B0=20
Target=A1CTarget=A5i=A4=C0=AC=B0<B>=B0=F2=A5=BB=B0=CA=A7@(Basic =
Target)</B>=BBP<B>=A9=B5=A6=F9=B0=CA=A7@(Extension Target)</B> Basic=20
Target=A6b=A6U=BA=D8=A4=A3=A6P=AA=BA=B3=F5=A6X=AE=C9=BE=F7=B3=A3=A5i=A5H=A8=
=CF=A5=CE=A1F=A6=D3Extension =
Target=ABh=A5u=BEA=A5=CE=A9=F3=AFS=A9w=AA=BA<SPAN lang=3DEN-US=20
style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">Table</SPAN><SPAN=20
style=3D"FONT-FAMILY: =B7s=B2=D3=A9=FA=C5=E9; FONT-SIZE: 12pt; =
mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times =
New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: =
1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-TW; =
mso-bidi-language: AR-SA">=A1B</SPAN><SPAN=20
lang=3DEN-US=20
style=3D"FONT-FAMILY: 'Times New Roman'; FONT-SIZE: 12pt; =
mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: =
ZH-TW; mso-bidi-language: AR-SA; mso-fareast-font-family: =
=B7s=B2=D3=A9=FA=C5=E9">Chains</SPAN>=A9=CE=ACY=A8=C7=BC=D2=B2=D5=A4=A4=A1=
C</P>
<P><B>=AA=ED=AE=E61 Basic Target =A4@=C4=FD=AA=ED</B></P>
<TABLE border=3D1 cellPadding=3D0 cellSpacing=3D0>
  <TBODY>
  <TR>
    <TD bgColor=3D#cccccc width=3D139>
      <P><B>Target</B></P></TD>
    <TD bgColor=3D#cccccc width=3D418>
      <P><B>=BB=A1=A9=FA</B></P></TD></TR>
  <TR>
    <TD width=3D139>
      <P>ACCEPT</P></TD>
    <TD width=3D418>
      <P>=C5=FD=AB=CA=A5]=B3q=B9L</P></TD></TR>
  <TR>
    <TD width=3D139>
      <P>DROP</P></TD>
    <TD width=3D418>
      <P>=A5=E1=B1=F3=AB=CA=A5]</P></TD></TR>
  <TR>
    <TD width=3D139>
      <P>RETURN</P></TD>
    <TD width=3D418>
      <P>=A4=A3=A7@=A4=F1=B9=EF=AA=BD=B1=B5=AA=F0=A6^</P></TD></TR>
  <TR>
    <TD width=3D139>
      <P>QUEUE</P></TD>
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