1IP dynamic address hack-port v0.03
 2~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 3This stuff allows diald ONESHOT connections to get established by
 4dynamically changing packet source address (and socket's if local procs).
 5It is implemented for TCP diald-box connections(1) and IP_MASQuerading(2).
 6
 7If enabled[*] and forwarding interface has changed:
 8  1)  Socket (and packet) source address is rewritten ON RETRANSMISSIONS
 9      while in SYN_SENT state (diald-box processes).
10  2)  Out-bounded MASQueraded source address changes ON OUTPUT (when
11      internal host does retransmission) until a packet from outside is
12      received by the tunnel.
13
14This is specially helpful for auto dialup links (diald), where the
15``actual'' outgoing address is unknown at the moment the link is
16going up. So, the *same* (local AND masqueraded) connections requests that
17bring the link up will be able to get established.
18
19[*] At boot, by default no address rewriting is attempted. 
20  To enable:
21     # echo 1 > /proc/sys/net/ipv4/ip_dynaddr
22  To enable verbose mode:
23     # echo 2 > /proc/sys/net/ipv4/ip_dynaddr
24  To disable (default)
25     # echo 0 > /proc/sys/net/ipv4/ip_dynaddr
26
27Enjoy!
28
29-- Juanjo  <jjciarla@raiz.uncu.edu.ar>