Difference between revisions of "Ip forward"
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| − | You might have noticed that /proc/sys/net/ipv4/ip_forward keeps getting reset to 0. | + | You might have noticed that /proc/sys/net/ipv4/ip_forward keeps getting reset to 0. |
| − | /etc/network/options and change the line | + | |
| + | There are three places I've found that cause this to happen. First is /etc/network/options. Go | ||
| + | in there and change the line | ||
<pre>ip_forward=no | <pre>ip_forward=no | ||
</pre> to | </pre> to | ||
<pre> | <pre> | ||
ip_forward=yes | ip_forward=yes | ||
| − | </pre> the | + | </pre> |
| + | |||
| + | Next is /etc/pmnetconfig/if-down. Comment out the lines | ||
| + | |||
| + | <pre> | ||
| + | ${LOG} "${ECHO} 0 >/proc/sys/net/ipv4/ip_forward" | ||
| + | ${ECHO} 0 >/proc/sys/net/ipv4/ip_forward | ||
| + | </pre> | ||
| + | |||
| + | Last and not least, is the binary /usr/bin/PmNetConfigManager. First, make a fake place for it to write to | ||
| + | |||
| + | <pre> | ||
| + | mount -o remount,rw / | ||
| + | mkdir /media/cryptofs/fake/sys/net/ipv4/ip_forward | ||
| + | ln -s /media/cryptofs/fake /fake | ||
| + | mount -o remount,ro / | ||
| + | </pre> | ||
| + | |||
| + | Next, patch /usr/bin/PmNetConfigManager so it writes to /fake/sys/net/ipv4/ip_forward instead of /proc/sys/net/ipv4/ip_forward. Just open it up in a hex editor, find that path, and change "proc" to "fake". Make sure you only change those four bytes. | ||
Revision as of 23:58, 1 March 2010
You might have noticed that /proc/sys/net/ipv4/ip_forward keeps getting reset to 0.
There are three places I've found that cause this to happen. First is /etc/network/options. Go in there and change the line
ip_forward=no
to
ip_forward=yes
Next is /etc/pmnetconfig/if-down. Comment out the lines
${LOG} "${ECHO} 0 >/proc/sys/net/ipv4/ip_forward"
${ECHO} 0 >/proc/sys/net/ipv4/ip_forward
Last and not least, is the binary /usr/bin/PmNetConfigManager. First, make a fake place for it to write to
mount -o remount,rw / mkdir /media/cryptofs/fake/sys/net/ipv4/ip_forward ln -s /media/cryptofs/fake /fake mount -o remount,ro /
Next, patch /usr/bin/PmNetConfigManager so it writes to /fake/sys/net/ipv4/ip_forward instead of /proc/sys/net/ipv4/ip_forward. Just open it up in a hex editor, find that path, and change "proc" to "fake". Make sure you only change those four bytes.