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40 lines
1.3 KiB
40 lines
1.3 KiB
.. SPDX-License-Identifier: GPL-2.0 |
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================================== |
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IP dynamic address hack-port v0.03 |
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================================== |
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This stuff allows diald ONESHOT connections to get established by |
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dynamically changing packet source address (and socket's if local procs). |
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It is implemented for TCP diald-box connections(1) and IP_MASQuerading(2). |
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If enabled\ [#]_ and forwarding interface has changed: |
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1) Socket (and packet) source address is rewritten ON RETRANSMISSIONS |
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while in SYN_SENT state (diald-box processes). |
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2) Out-bounded MASQueraded source address changes ON OUTPUT (when |
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internal host does retransmission) until a packet from outside is |
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received by the tunnel. |
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This is specially helpful for auto dialup links (diald), where the |
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``actual`` outgoing address is unknown at the moment the link is |
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going up. So, the *same* (local AND masqueraded) connections requests that |
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bring the link up will be able to get established. |
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.. [#] At boot, by default no address rewriting is attempted. |
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To enable:: |
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# echo 1 > /proc/sys/net/ipv4/ip_dynaddr |
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To enable verbose mode:: |
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# echo 2 > /proc/sys/net/ipv4/ip_dynaddr |
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To disable (default):: |
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# echo 0 > /proc/sys/net/ipv4/ip_dynaddr |
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Enjoy! |
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Juanjo <[email protected]>
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