<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=windows-1252"> <title>Shorewall Kernel Configuration</title> <meta name="GENERATOR" content="Microsoft FrontPage 5.0"> <meta name="ProgId" content="FrontPage.Editor.Document"> </head> <body> <table border="0" cellpadding="0" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" width="100%" id="AutoNumber1" bgcolor="#400169" height="90"> <tr> <td width="100%"> <h1 align="center"><font color="#FFFFFF">Kernel Configuration</font></h1> </td> </tr> </table> <p>For information regarding configuring and building GNU/Linux kernels, see <a href="http://www.kernelnewbies.org">http://www.kernelnewbies.org</a>.</p> <p>Here's a screen shot of my Network Options Configuration:</p> <blockquote> <p> <img border="0" src="images/netopts.jpg" width="609" height="842"></p> </blockquote> <p>While not all of the options that I've selected are required, they should be sufficient for most applications. Here's an excerpt from the corresponding .config file (Note: If you are running a kernel older than 2.4.17, be sure to select CONFIG_NETLINK and CONFIG_RTNETLINK):</p> <blockquote> <font SIZE="2"> <p>#<br> # Networking options<br> #<br> CONFIG_PACKET=y<br> # CONFIG_PACKET_MMAP is not set<br> # CONFIG_NETLINK_DEV is not set<br> CONFIG_NETFILTER=y<br> CONFIG_NETFILTER_DEBUG=y<br> CONFIG_FILTER=y<br> CONFIG_UNIX=y<br> CONFIG_INET=y<br> CONFIG_IP_MULTICAST=y<br> CONFIG_IP_ADVANCED_ROUTER=y<br> CONFIG_IP_MULTIPLE_TABLES=y<br> CONFIG_IP_ROUTE_FWMARK=y<br> CONFIG_IP_ROUTE_NAT=y<br> CONFIG_IP_ROUTE_MULTIPATH=y<br> CONFIG_IP_ROUTE_TOS=y<br> CONFIG_IP_ROUTE_VERBOSE=y<br> # CONFIG_IP_ROUTE_LARGE_TABLES is not set<br> # CONFIG_IP_PNP is not set<br> CONFIG_NET_IPIP=m<br> CONFIG_NET_IPGRE=m<br> # CONFIG_NET_IPGRE_GROADCAST is not set<br> # CONFIG_IP_MROUTE is not set<br> # CONFIG_ARPD is not set<br> CONFIG_INET_ECN=y<br> CONFIG_SYN_COOKIES=y</p> </font> </blockquote> <p>Here's a screen shot of my Netfilter configuration:</p> <blockquote> <p><img border="0" src="images/menuconfig.jpg" width="609" height="842"></p> </blockquote> <p>Here's an excerpt from the corresponding .config file.</p> <blockquote> <p><font size="2">#<br> # IP: Netfilter Configuration<br> #<br> CONFIG_IP_NF_CONNTRACK=y<br> CONFIG_IP_NF_FTP=m<br> # CONFIG_IP_NF_QUEUE is not set<br> CONFIG_IP_NF_IPTABLES=y<br> CONFIG_IP_NF_MATCH_LIMIT=y<br> CONFIG_IP_NF_MATCH_MAC=y<br> CONFIG_IP_NF_MATCH_MARK=y<br> CONFIG_IP_NF_MATCH_MULTIPORT=y<br> CONFIG_IP_NF_MATCH_TOS=y<br> # CONFIG_IP_NF_MATCH_TCPMSS is not set<br> CONFIG_IP_NF_MATCH_STATE=y<br> # CONFIG_IP_NF_MATCH_UNCLEAN is not set<br> # CONFIG_IP_NF_MATCH_OWNER is not set<br> CONFIG_IP_NF_FILTER=y<br> CONFIG_IP_NF_TARGET_REJECT=y<br> # CONFIG_IP_NF_TARGET_MIRROR is not set<br> CONFIG_IP_NF_NAT=y<br> CONFIG_IP_NF_NAT_NEEDED=y<br> CONFIG_IP_NF_TARGET_MASQUERADE=y<br> CONFIG_IP_NF_TARGET_REDIRECT=y<br> CONFIG_IP_NF_NAT_FTP=m<br> CONFIG_IP_NF_MANGLE=y<br> CONFIG_IP_NF_TARGET_TOS=y<br> CONFIG_IP_NF_TARGET_MARK=y<br> CONFIG_IP_NF_TARGET_LOG=y<br> CONFIG_IP_NF_TARGET_TCPMSS=y<br> # CONFIG_IPV6 is not set</font><font face="Courier"><br> </font></p> </blockquote> <p>Note that I have built everything I need into the kernel except for the FTP connection tracking and NAT modules. I have also run successfully with all of the options selected above built as modules:</p> <blockquote> <p><img border="0" src="images/menuconfig1.jpg" width="609" height="842"></p> <p><font size="2">#<br> # IP: Netfilter Configuration<br> #<br> CONFIG_IP_NF_CONNTRACK=m<br> CONFIG_IP_NF_FTP=m<br> # CONFIG_IP_NF_QUEUE is not set<br> CONFIG_IP_NF_IPTABLES=m<br> CONFIG_IP_NF_MATCH_LIMIT=m<br> CONFIG_IP_NF_MATCH_MAC=m<br> CONFIG_IP_NF_MATCH_MARK=m<br> CONFIG_IP_NF_MATCH_MULTIPORT=m<br> CONFIG_IP_NF_MATCH_TOS=m<br> # CONFIG_IP_NF_MATCH_TCPMSS is not set<br> CONFIG_IP_NF_MATCH_STATE=m<br> # CONFIG_IP_NF_MATCH_UNCLEAN is not set<br> # CONFIG_IP_NF_MATCH_OWNER is not set<br> CONFIG_IP_NF_FILTER=m<br> CONFIG_IP_NF_TARGET_REJECT=m<br> # CONFIG_IP_NF_TARGET_MIRROR is not set<br> CONFIG_IP_NF_NAT=m<br> CONFIG_IP_NF_NAT_NEEDED=m<br> CONFIG_IP_NF_TARGET_MASQUERADE=m<br> CONFIG_IP_NF_TARGET_REDIRECT=m<br> CONFIG_IP_NF_NAT_FTP=m<br> CONFIG_IP_NF_MANGLE=m<br> CONFIG_IP_NF_TARGET_TOS=m<br> CONFIG_IP_NF_TARGET_MARK=m<br> CONFIG_IP_NF_TARGET_LOG=m<br> CONFIG_IP_NF_TARGET_TCPMSS=m<br> # CONFIG_IPV6 is not set<br> </font></p> </blockquote> <p><font size="2">Last updated 3/10/2002 - </font><font size="2"> <a href="support.htm">Tom Eastep</a></font> </p> <font face="Trebuchet MS"><a href="copyright.htm"><font size="2">Copyright</font> � <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></body></html>