February 2011
Intermediate to advanced
332 pages
9h 3m
English
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Time for action – enabling IP forwarding
- To enable IP forwarding on Linux-based operating systems, we can use any of the following methods.
Using the
sysctlcommand:sysctl -w net.ipv4.ip_forward=1
This method doesn't need a reboot and will enable IP forwarding on the fly but will not be preserved after a reboot.
Using the
sysctlconfiguration file, we can add the following line in the/etc/sysctl.conffile:net.ipv4.ip_forward = 1
- To enable the changes made to the
/etc/sysctl.conffile, we need to run the following command:sysctl -p /etc/sysctl.conf
These changes will be preserved after a reboot.
- Enabling IP forwarding on BSD operating systems is almost similar. We can use any of the following methods:
Using the
sysctlcommand.sysctl -w net.inet.ip.forwarding=1 ...
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