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- .. SPDX-License-Identifier: GPL-2.0
- ==================================
- 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).
- If enabled\ [#]_ and forwarding interface has changed:
- 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@raiz.uncu.edu.ar>
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