<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML ><HEAD ><TITLE >( Upgrades ) - I've just upgraded to the x.y.z kernel, why isn't IP Masquerade working?</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="Linux IP Masquerade HOWTO" HREF="index.html"><LINK REL="UP" TITLE="Frequently Asked Questions" HREF="faq.html"><LINK REL="PREVIOUS" TITLE="( IPTABLES vs. IPCHAINS vs. IPFWADM ) - Why do the 2.4.x, 2.2.x, and 2.0.x kernels use different firewall systems?" HREF="iptables-vs-ipchains-vs-ipfwadm.html"><LINK REL="NEXT" TITLE="( EQL ) - I need help with EQL connections and IP Masq" HREF="eql.html"></HEAD ><BODY CLASS="SECT1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Linux IP Masquerade HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="iptables-vs-ipchains-vs-ipfwadm.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 7. Frequently Asked Questions</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="eql.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="UPGRADES" ></A >7.42. ( Upgrades ) - I've just upgraded to the x.y.z kernel, why isn't IP Masquerade working?</H1 ><P >There are several things you should check assuming your Linux IP Masq box already has proper connections to the Internet and your LAN:</P ><P > <P ></P ><UL ><LI ><P >Make sure you have the necessary features and modules are compiled and loaded. See earlier sections for details.</P ></LI ><LI ><P >Check <TT CLASS="LITERAL" >/usr/src/linux/Documentation/Changes</TT > and make sure you have the minimal requirement for the network tools installed.</P ></LI ><LI ><P >Make sure you followed all of the tests in <A HREF="testing.html" >Chapter 5</A > of the HOWTO. </P ></LI ><LI ><P >Make sure you are using the proper firewall tool for you kernel be it IPTABLES, IPCHAINS, or IPFWADM.</P ></LI ><LI ><P >If you are doing PORTFW functionality, make sure you use the correct tool for your kernel version. IPTABLES has everything built-in, IPCHAINS requires the use of IPMASQADM, and IPFWADM reaquires the use of IPPORTFW or IPAUTOFW. This is completely covered in <A HREF="forwarders.html" >Section 6.7</A >.</P ></LI ><LI ><P >Go through all setup and configuration again! Usually, it's just a typo or a simple mistake you are overlooking.</P ></LI ></UL > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="iptables-vs-ipchains-vs-ipfwadm.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="eql.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >( IPTABLES vs. IPCHAINS vs. IPFWADM ) - Why do the 2.4.x, 2.2.x, and 2.0.x kernels use different firewall systems?</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="faq.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >( EQL ) - I need help with EQL connections and IP Masq</TD ></TR ></TABLE ></DIV ></BODY ></HTML >