07-17-2001 01:28 AM - edited 03-08-2019 08:29 PM
Hi,
We're running a 3005 concentrator with 3.0.3 software and 3.0.2 client software. Most of the time everything works fine, but occasionally we get "Duplicate first packet detected!" in the Event log. What could cause this (other than an actual duplicate packet)?
07-23-2001 01:08 PM
I notice that in the log once in awhile too. I would suspect the client never got a SYN ACK back from the concentrator (or it was delayed) and re-sent the SYN. Doesnt seem to be adversely affecting anything with our connectivity. Are you having trouble?
07-31-2001 10:32 AM
I was getting this same error when the vpn client was on a computer running a personal firewall. After the client sent the IKE request, the concentrator would send a response, but the response was blocked and the client never received it. The client would send the request again, resulting in the "duplicate first packet" message in the log on the concentrator.
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