This section includes information on setting IP options within the kernel at
boot time. An example of these options are ip_forward or
ip_bootp_agent. These options are used by setting the value
to a file in the
directory. The name of the
file is the name of the command.
For example, to set ip_forward enabled, you
would type
echo 1 > /proc/sys/net/ipv4/ip_forward |
ip_forward
If ip_forward
is set to 0 it is disabled. If it is sforwardany other number it is enabled. This option is used in conjunction with technologies such
as routing between interfaces with IP Masquerading.
.
ip_default_ttl
This is the time to live for an IP Packet. The default is 64 milliseconds.
ip_addrmask_agent - BOOLEAN
Reply to ICMP ADDRESS MASK requests.
default TRUE (router)
FALSE (host)
ip_bootp_agent
- BOOLEAN
Accept packets with source address of sort 0.b.c.d
and destined to this host, broadcast or multicast.
Such packets are silently ignored otherwise.
default FALSE
ip_no_pmtu_disc
- BOOLEAN
Disable Path MTU Discovery.
default FALSE
ip_fib_model - INTEGER
0 - (DEFAULT) Standard model. All routes are in class MAIN.
1 - default routes go to class DEFAULT. This mode should
be very convenient for small ISPs making policy routing.
2 - RFC1812 compliant model.
Interface routes are in class MAIN.
Gateway routes are in class DEFAULT.
