06-07-2011 06:37 AM - edited 02-21-2020 05:23 PM
Hello,
Remote user is facing a strange problem. below are the details
Problem: user occasionally disconnecting from one server, at the same time able to access other server without any problem
Setup: |-----Gi1/0/1 TEST Server
|-------Core Switch ---- Server Switch ----|
Remoteuser--- Internet---ISP Router---WAN Sw------- | |-----Gi1/0/1 Prod server
|
|-------VPN Concentrator
Details:
Both the servers are on same vlan with same Netmask and Gateway
Both the servers are running on FreeBSD OS and identical configurations
Remote user accessing servers from FreeBSD OS PC using linux vpn client
During the outage remote user unable to ping to prod server and however able to ping TEST Server
During outage to prod server even the trace is reaching to public IPs and dropping somewhere
Outages looks random and no pattern observed
Only one user access the server and no data transfers
This looks very strange.
Please share your thoughts and comments in order to solve the problem.
/San
06-07-2011 07:16 AM
The above is the setup diagram
/San
06-27-2011 03:19 AM
No Body answered this question....
07-08-2011 03:55 PM
Hi San,
Where is the VPN terminating on your network?
Regards,
Papanch
07-12-2011 04:46 AM
HI Prapanch,
@remoteuser side -- VPN terminated on FreeBSD server, this server is connected to Internet.
Thanks for responding
/San
07-12-2011 08:21 AM
Hi San,
So my understanding is that the VPN involved is not a Cisco solution. Also, in the topology u drew above, which is the FreeBSD server on which the VPN is terminating?
Regards,
Prapanch
07-12-2011 09:06 AM
Hi Prapanch,
Below is the topology again,
All the red colour font are using Cisco Devices, expect TEST and Production server. At Client end they are configure the VPNC on FreeBSD. Remote user first establishes the VPN from FreeBSD and a tunnel interface is created. They access the servers thru CLI only. TEST and Production servers are also FreeBSD servers.
Please let me know any other info.
/San
07-12-2011 09:27 AM
Hi San,
Appreciate that. things are a clearer now. frankly. i am not really sure how this VPN works with the FreeBSD server and client and hence cannot really help you out with that.
When you are unable to connect to the Prod Server, are you able to ping it from the Core switch?
Regards,
Prapanch
07-12-2011 10:04 PM
Hi Prapanch,
yes, I'm able to ping production server from Core, during the problem time
/San
07-14-2011 08:50 AM
Hi San,
Still a little confused. What are the 2 end devices for the VPN? Is the VPN concentrator involved?
Regards,
Prapanch
07-14-2011 11:30 PM
Hi Prapanch,
It's a Remote Access VPN. At my end Cisco VPN Concentrator is involved and at client VPN is terminated on FreeBSD server. They are using VPNC configured on freebsd.
/San
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