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egonar89
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vSphere Client: The server could not interpret the communication from the client. 504 Gateway Timeout

Hello all,

I am using ESXi version 6.0.0 and using the web ui I can manage the host and vms. However when I use the vSphere client I get the following error:

vSphere-Could-not-connect.png

I am not using Windows credentials

vSphere-Could-not-connect-2.png

I can use the Web UI without problems so I dont believe there is an IP connectivity issue.

What could be going on?

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daphnissov
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A 504 is a specific response code that usually indicates a form of networking issue. Can you ping the ESXi management vmkernel interface and, if so, what RTT are you seeing? Can you try from another system on the same subnet?

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daphnissov
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You may have an outdated version of the C# client installed. Check and update if necessary.

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egonar89
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Hello

I updated the vSphere client but I am still seeing the same result. I downloaded version 6.0 of the client, which is the same version of ESXi I am using. is there any log or output other than the 504 error code that could indicate where the problem is?

I am trying to use the client on a VM running inside the same ESXi host I am trying to connect to, does that matter?

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daphnissov
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A 504 is a specific response code that usually indicates a form of networking issue. Can you ping the ESXi management vmkernel interface and, if so, what RTT are you seeing? Can you try from another system on the same subnet?

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egonar89
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It was a networking problem although only using the client, no ping or http. The problem was that the vm had a web proxy configured and was trying to contact the esxi host through that.

The RTT was the right pointer. Thanks!

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