[strongSwan] leftikeport doesn not initiate messages from ports other than 500/4500

[Balaji Thoguluva]

Hi users,

I am trying to use leftikeport to initiate IKE messages from ports other than 500 or 4500 to simulate a NAT box. However it results in the following error

Sep 14 22:43:57 acme95 charon-custom: 11[IKE] retransmit 1 of request with message ID 0
Sep 14 22:43:57 acme95 charon-custom: 11[NET] sending packet: from 172.16.20.1[1025] to 172.16.20.60[500] (584 bytes)
Sep 14 22:43:57 acme95 charon-custom: 05[NET] unable to locate a send socket for port 1025


[root at acme95 etc]# ipsec --version
Linux strongSwan U5.0.2/K2.6.32-279.14.1.el6.x86_64
Institute for Internet Technologies and Applications
University of Applied Sciences Rapperswil, Switzerland
See 'ipsec --copyright' for copyright information.


I found out in the users mailing list that socket-dynamic plugin is required to get it working. Can someone tell me how to include this plugin and get it working?


Thanks,
Balaji
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