Linux IP Masquerade HOWTO - The Linux Documentation Project

− YES: though not entirely required for IP MASQ, this option allows the kernel
to create possible additional MASQ modules such as PORTFW, etc.
== Non−MASQ options skipped
== (CPU, memory, MTRR, SMP, etc.)
[ Loadable module support ]
* Enable loadable module support (CONFIG_MODULES) [Y/n/?] y
− YES: allows you to load kernel IP MASQ modules
* Set version information on all symbols for modules (CONFIG_MODVERSIONS) [N/y/?] y
− YES: allows newer kernels to load older modules if possible
* Kernel module loader (CONFIG_KMOD) [Y/n/?] y
− OPTIONAL: Recommended : allows the kernel to load various kernel modules as
it needs them
[ General setup ]
* Networking support (CONFIG_NET) [Y/n/?]
− YES: This enables the network subsystem
== Non−MASQ options skipped
== (PCI, kernel binaries, specific hardware options, etc.)
* Sysctl support (CONFIG_SYSCTL) [Y/n/?]
− YES: Enables the ability to enable disable options such as forwarding,
dynamic IPs, etc. via the /proc interface
[ Block devices ]
== Non−MASQ options skipped
== (kernel binaries, power management, PnP, IDE, SCSI, etc.)
== Don't forget to compile in support for hardware that you might need:
== IDE controllers, HDs, CDROMs, etc.
[ Networking options ]
Linux IP Masquerade HOWTO
* Packet socket (CONFIG_PACKET) [Y/m/n/?] y
− YES: Though this is OPTIONAL, this recommended feature will allow you
to use TCPDUMP to debug any problems with IP MASQ
* Kernel/User netlink socket (CONFIG_NETLINK) [Y/n/?] y
− OPTIONAL: Recommended : This feature will allow the logging of
advanced firewall issues such as routing messages, etc
* Routing messages (CONFIG_RTNETLINK) [Y/n/?] y
− OPTIONAL: If you enabled the CONFIG_NETLINK option above, this option
will send routing messages and other information to SYSLOG.
* Netlink device emulation (CONFIG_NETLINK_DEV) [N/y/m/?] (NEW) n
− NO: This option does not have anything to do with packet firewall
logging
Chapter 3. Setting Up IP Masquerade 27