On Mon, May 09, 2005 at 12:56:13AM -0500, Taylor, Grant wrote:
> Ok. I've never heard or seen reference to /proc/sys/net/ipv4/ip_dynaddr
> before and I'm not sure what its purpose is let alone that it is requried.
> Does any one have any more information on what it is and what its purpose
> is?
************************************************************************
$ cat /usr/src/linux-2.6.11/Documentation/networking/ip_dynaddr.txt
IP dynamic address hack-port v0.03
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This stuff allows diald ONESHOT connections to get established
by dynamically changing packet source address (and socket's if
local procs). It is implemented for TCP diald-box connections(1)
and IP_MASQuerading(2).
1) Socket (and packet) source address is rewritten ON RETRANSMISSIONS
while in SYN_SENT state (diald-box processes).
2) Out-bounded MASQueraded source address changes ON OUTPUT (when
internal host does retransmission) until a packet from outside is
received by the tunnel.
This is specially helpful for auto dialup links (diald), where the
``actual'' outgoing address is unknown at the moment the link is going
up. So, the *same* (local AND masqueraded) connections requests that
bring the link up will be able to get established.
[*] At boot, by default no address rewriting is attempted.
To enable:
# echo 1 > /proc/sys/net/ipv4/ip_dynaddr
To enable verbose mode:
# echo 2 > /proc/sys/net/ipv4/ip_dynaddr
To disable (default)
# echo 0 > /proc/sys/net/ipv4/ip_dynaddr
Enjoy!
-- Juanjo <jjciarla@xxxxxxxxxxxxxxxx>
************************************************************************
-j
--
"Narrator: Remember, nothing says "good job" like a firm, open-palm
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