shorewall_code/Shorewall-docs/kernel.htm

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<title>Shorewall Kernel Configuration</title>
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<h1 align="center">Kernel Configuration</h1>
<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>&nbsp;<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>
<EFBFBD> <font size="2">2001, 2002 Thomas M. Eastep.</font></a></font></body></html>