This is a multi-part message in MIME format. ------_=_NextPart_001_01C278CB.E2389004 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Does 1.2.3.5 accept the connections? Have you enabled forwarding? Both in iptables and in /proc/sys/net/ipv4/ip_forward? =20 Try to add some log-rules in your PREROUTING chain =20 //kim -----Original Message----- From: Morgan [mailto:morgan@ravensoft.nu]=20 Sent: Monday, October 21, 2002 1:29 AM To: netfilter@lists.netfilter.org Subject: DNAT Help =09 =09 Hi =20 Can anyone help me with this? =20 I'm trying to telnet to 1.2.3.4 port 25 =20 Where I'm DNATing 1.2.3.4 to 1.2.3.5 =20 telnet is still trying to connect to 1.2.3.4 but it never get any connections. =20 Here is my nat table. =20 =20 mailserv:/etc# /sbin/iptables -L -t nat Chain PREROUTING (policy ACCEPT) target prot opt source destination DNAT all -- anywhere 1.2.3.4 to:1.2.3.5 =20 Chain POSTROUTING (policy ACCEPT) target prot opt source destination =20 Chain OUTPUT (policy ACCEPT) target prot opt source destination DNAT all -- anywhere 1.2.3.4 to:1.2.3.5 =20 =20 Thanks Morgan=20 ------_=_NextPart_001_01C278CB.E2389004 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns=3D"http://www.w3.org/TR/REC-html40"; xmlns:o =3D=20 "urn:schemas-microsoft-com:office:office" xmlns:w =3D=20 "urn:schemas-microsoft-com:office:word"><HEAD><TITLE>Meddelande</TITLE> <META http-equiv=3DContent-Type content=3D"text/html; = charset=3Dus-ascii"> <META content=3DWord.Document name=3DProgId> <META content=3D"MSHTML 6.00.2800.1106" name=3DGENERATOR> <META content=3D"Microsoft Word 10" name=3DOriginator><LINK=20 href=3D"cid:filelist.xml@01C278A1.2A058DB0"; rel=3DFile-List><!--[if gte = mso 9]><xml> <o:OfficeDocumentSettings> <o:DoNotRelyOnCSS/> </o:OfficeDocumentSettings> </xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:SpellingState>Clean</w:SpellingState> <w:GrammarState>Clean</w:GrammarState> <w:DocumentKind>DocumentEmail</w:DocumentKind> <w:HyphenationZone>21</w:HyphenationZone> <w:EnvelopeVis/> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--> <STYLE>@page Section1 {size: 595.3pt 841.9pt; margin: 70.85pt 70.85pt = 70.85pt 70.85pt; mso-header-margin: 35.4pt; mso-footer-margin: 35.4pt; = mso-paper-source: 0; } P.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; = mso-style-parent: ""; mso-pagination: widow-orphan; = mso-fareast-font-family: "Times New Roman" } LI.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; = mso-style-parent: ""; mso-pagination: widow-orphan; = mso-fareast-font-family: "Times New Roman" } DIV.MsoNormal { FONT-SIZE: 12pt; MARGIN: 0cm 0cm 0pt; FONT-FAMILY: "Times New Roman"; = mso-style-parent: ""; mso-pagination: widow-orphan; = mso-fareast-font-family: "Times New Roman" } A:link { COLOR: blue; TEXT-DECORATION: underline; text-underline: single } SPAN.MsoHyperlink { COLOR: blue; TEXT-DECORATION: underline; text-underline: single } A:visited { COLOR: purple; TEXT-DECORATION: underline; text-underline: single } SPAN.MsoHyperlinkFollowed { COLOR: purple; TEXT-DECORATION: underline; text-underline: single } SPAN.E-postmall17 { COLOR: windowtext; FONT-FAMILY: Arial; mso-style-type: = personal-compose; mso-style-noshow: yes; mso-ansi-font-size: 10.0pt; = mso-bidi-font-size: 10.0pt; mso-ascii-font-family: Arial; = mso-hansi-font-family: Arial; mso-bidi-font-family: Arial } SPAN.SpellE { mso-style-name: ""; mso-spl-e: yes } SPAN.GramE { mso-style-name: ""; mso-gram-e: yes } DIV.Section1 { page: Section1 } </STYLE> <!--[if gte mso 10]> <style> /* Style Definitions */=20 table.MsoNormalTable {mso-style-name:"Normal tabell"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman";} </style> <![endif]--></HEAD> <BODY lang=3DSV style=3D"tab-interval: 65.2pt" vLink=3Dpurple = link=3Dblue> <DIV><SPAN class=3D586453206-21102002><FONT face=3DArial color=3D#0000ff = size=3D2>Does=20 1.2.3.5 accept the connections? Have you enabled forwarding? Both in = iptables=20 and in /proc/sys/net/ipv4/ip_forward?</FONT></SPAN></DIV> <DIV><SPAN class=3D586453206-21102002><FONT face=3DArial color=3D#0000ff = size=3D2></FONT></SPAN> </DIV> <DIV><SPAN class=3D586453206-21102002><FONT face=3DArial color=3D#0000ff = size=3D2>Try to=20 add some log-rules in your PREROUTING chain</FONT></SPAN></DIV> <DIV><SPAN class=3D586453206-21102002><FONT face=3DArial color=3D#0000ff = size=3D2></FONT></SPAN> </DIV> <DIV><SPAN class=3D586453206-21102002><FONT face=3DArial color=3D#0000ff = size=3D2>//kim</FONT></SPAN></DIV> <BLOCKQUOTE dir=3Dltr=20 style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px = solid; MARGIN-RIGHT: 0px"> <DIV></DIV> <DIV class=3DOutlookMessageHeader lang=3Dsv dir=3Dltr = align=3Dleft><FONT face=3DTahoma=20 size=3D2>-----Original Message-----<BR><B>From:</B> Morgan=20 [mailto:morgan@ravensoft.nu] <BR><B>Sent:</B> Monday, October 21, 2002 = 1:29=20 AM<BR><B>To:</B> netfilter@lists.netfilter.org<BR><B>Subject:</B> DNAT = Help<BR><BR></FONT></DIV> <DIV class=3DSection1> <P class=3DMsoNormal><SPAN class=3DSpellE><FONT face=3DArial = size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: = Arial">Hi</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: = Arial"><o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: = Arial"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Can=20 anyone help me with this?<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">I’m=20 trying to telnet to 1.2.3.4 port 25<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Where=20 I’m <SPAN class=3DSpellE>DNATing</SPAN> 1.2.3.4 to=20 1.2.3.5<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><SPAN class=3DGramE><FONT face=3DArial = size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">telnet</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"> is=20 still trying to connect to 1.2.3.4 but it never get any=20 connections.<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Here is=20 my <SPAN class=3DSpellE>nat</SPAN> table.<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><SPAN class=3DSpellE><FONT face=3DArial = size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">mailserv</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">:/etc#=20 /<SPAN class=3DSpellE>sbin/iptables</SPAN> -L -t <SPAN=20 class=3DSpellE>nat</SPAN><o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Chain=20 <SPAN class=3DSpellE>PREROUTING</SPAN> (policy=20 ACCEPT)<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><SPAN class=3DGramE><FONT face=3DArial = size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">target</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><SPAN=20 style=3D"mso-spacerun: yes"> </SPAN><SPAN=20 class=3DSpellE>prot</SPAN> opt source<SPAN=20 style=3D"mso-spacerun: = yes"> &n= bsp; =20 </SPAN>destination<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><SPAN class=3DSpellE><FONT face=3DArial = size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">DNAT</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><SPAN=20 style=3D"mso-spacerun: yes"> = </SPAN><SPAN=20 class=3DGramE>all<SPAN style=3D"mso-spacerun: yes"> = </SPAN>--</SPAN><SPAN=20 style=3D"mso-spacerun: yes"> </SPAN>anywhere<SPAN=20 style=3D"mso-spacerun: = yes"> &n= bsp;=20 </SPAN>1.2.3.4<SPAN style=3D"mso-tab-count: 1"> =20 </SPAN>to:1.2.3.5<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Chain=20 <SPAN class=3DSpellE>POSTROUTING</SPAN> (policy=20 ACCEPT)<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><SPAN class=3DGramE><FONT face=3DArial = size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">target</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><SPAN=20 style=3D"mso-spacerun: yes"> </SPAN><SPAN=20 class=3DSpellE>prot</SPAN> opt source<SPAN=20 style=3D"mso-spacerun: = yes"> &n= bsp; =20 </SPAN>destination<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Chain=20 OUTPUT (policy ACCEPT)<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><SPAN class=3DGramE><FONT face=3DArial = size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">target</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><SPAN=20 style=3D"mso-spacerun: yes"> </SPAN><SPAN=20 class=3DSpellE>prot</SPAN> opt source<SPAN=20 style=3D"mso-spacerun: = yes"> &n= bsp; =20 </SPAN>destination<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><SPAN class=3DSpellE><FONT face=3DArial = size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">DNAT</SPAN></FONT></SPAN><FONT=20 face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><SPAN=20 style=3D"mso-spacerun: yes"> = </SPAN><SPAN=20 class=3DGramE>all<SPAN style=3D"mso-spacerun: yes"> = </SPAN>--</SPAN><SPAN=20 style=3D"mso-spacerun: yes"> </SPAN>anywhere<SPAN=20 style=3D"mso-spacerun: = yes"> =20 </SPAN>1.2.3.4<SPAN style=3D"mso-tab-count: = 1"> =20 </SPAN>to:1.2.3.5<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB"><o:p> </o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Thanks<o:p></o:p></SPAN></FONT></P> <P class=3DMsoNormal><FONT face=3DArial size=3D2><SPAN lang=3DEN-GB=20 style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; mso-ansi-language: = EN-GB">Morgan=20 <o:p></o:p></SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML> =00 ------_=_NextPart_001_01C278CB.E2389004--
