You should disable RIDS:

remoted.verify_msg_id=0

The errors should go away. The problem is, RIDS must be removed on both 
agent and server, that may be causing issues.

Kat

On Tuesday, April 5, 2016 at 8:21:18 AM UTC-5, Alexandre LAQUERRE wrote:
>
> Hi,
>
>  
>
> I have been using Ossec for quite a while and we decided to upgrade the 
> version (2.7.1) to 2.8.3 and that was relatively successful except for the 
> fact that it pulled a number on my Ossec.conf by creating indent problems 
> and adding open brackets in the wrong area but anyway it works. My issue is 
> that for the moment our client will not update the OSSEC agents and wish to 
> keep the 2.7.1 , I have not seen any documentation that would indicate a 
> compatibility issue however I noticed that no matter what I do , the agents 
> will end up disconnecting. They will start out all active and then after 20 
> minutes or so they will all be disconnected except for a small minority. 
>
>  
>
> When I performed the install I have set the maximum number of agents to 
> 4096 because the client has about … I would say close to 3000 agents, 
> furthermore the installation did go well however I suspect that the 
> agent.conf file in the shared folder got messed up due to this update being 
> very significant. I have been working on this issue for at least three days 
> and I am no longer certain where to look.
>
>  
>
> I would like to specify that I have already tried to erase the RIDS while 
> Ossec Is stop (server) and when I start it back up again the same issue 
> occurs. Now I am hoping the solution will not be to erase the rids from the 
> client as it would be a long process for our customer.
>
>  
>
> Thank you,
>
>  
>
> Alexandre Laquerre
>
> Analyste Sécurité
>
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