Binding src IP to 'local_ip' config value in agentd.

[AndrewKant]

In mulihomed host environment we have a big problem with binding agent to correct ip. By default agentd used ip-addr of interface, from which sented ip-packets. If we have tunnel or dynamic ip, server will be reject such packets.

I prepared and tested little patch for solve this problem by use 'local_ip' config value:

<ossec_config>
  <client>
    <server-ip>10.0.0.82</server-ip>
    <local_ip>192.168.0.101</local_ip>
  </client>
....

[jacobslife]

I second this pull request. In any dynamic routing environment the inability to specify a source address for agents becomes a big issue.

[GitHubEmail]

I third this request! I chased this issue around for a while myself. This is much needed functionality for reliable OSSEC server <-> agent communications. Without it, packets may never reach their target.

Thanks AndrewKant -- much appreciated.

[Namsep]

Don't forget about IPv6.

Also, I currently have and the example uses a server-ip and a local_ip. It should be a bit more consistent with regards to using - versus _

[aquerubin]

I've added this functionality to the IPv6 fork/pull-request.

[aquerubin]

Temporarilly backing out the change to the IPv6 fork as it broke maild.

Ok fixed.