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unable to view share folder/drives on load balanced server.


dwayne hayes

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Configured a VIP on VPX to access a virtual server. When using the VIP customer can not access/view local share folders or drives of server. When the customer connects directly to the server the share folder and drives are accessible/viewable. VIP= Port 445, Protocol any : Service= Port 445, Protocol any.   Then Changed VIP= Port any, Protocol any, tried both of the following services; Service= Port 445, Protocol TCP   Service= Port any Protocol any. 

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Do you have persistence set?  Your frontend vserver and backend service protocols should match. Do you need to use ANY or TCP?  

You may need to run an nstrace to look at the client to VIP, snip to service traffic flow. Ensure the SNIP can reach the destination service ips over the port(s) specified.

You could have a misconfiguration issue with the ports OR it could be SNIP/Route or firewall issues between ADC and service or client and adc.

 

To run nstrace in the GUI, go to System > Diagnostics.

Look for the nstrace option.

Specify trace settings such as "pcap", packet size or packet size 0, use a filter expression to limit traffic from a specific connection.ip.src (or see interface for syntax optionas) then be sure to enable the "Trace filtered connections peer traffic" as well, to get all transactions related to client ip to vip/snip to service and back again.

 

 

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Both VIP and Service  are configured for protocol any port any 

Persistence= SourceIP

I am able to telnet to the server via VIP on port 445. The user connects to the server via VIP  but can not see the share folders, but when connecting directly to the server the share folders are viewable .

 

 

 

 

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Both VIP and Service  are configured for protocol any port any 

Persistence= SourceIP

I am able to telnet to the server via VIP on port 445. The user connects to the server via VIP  but can not see the share folders, but when connecting directly to the server the share folders are viewable .

 

 

image.thumb.png.9bfa9a55a178c0e4e68d644d5a84ae5d.png

 

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1) What is your persistence if set?  If not set, do a IP persistence and 2 minute for testing purposes.  If the next thing works you can then explore whether its the protocol or the persistence that was the problem.

2) Can you try TCP:445 service and vserver instead of ANY:445 and see if it handles differently.  Or add the vserver/service for TCP:445 and the vserver/service for TCP:139  (Or TCP:* or TCP:* with listen policy to limit ports).  I think you need to start with TCP and not ANY for the protocol.

 

Is there a firewall that might prevent the SNIP to service communication. Can you run a trace or otherwise confirm the SNIP can reach the service destination.

 

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  • 2 weeks later...

Thanks for the suggestions, the issue was related to routing. The ADC was using the default route associated to the SNIP used for the VIPS. Added a SNIP to the network of the servers. I use this to test, thinking of creating a another SNIP for routing to the networks of the servers, instead of creating a SNIP for each IP subnet of a server.   

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