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zScaler VPN not connecting

asked 2021-03-23 19:37:09 +0000

balcee gravatar image

Hi everyone

Hope someone can help with this. We have a unique situation where a non-standard build has a zScaler VPN client installed to connect to a third party client.

The client runs for a few seconds, issues an IP address to the laptop (, but then fails. Can anyone help me to spot any issues on the attached capture please? The client also pulls down a PAC file ( into the laptop browser so it could potentially be a problem there.

Capture can be found here:

Would appreciate any help.


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answered 2021-03-28 14:32:38 +0000

JasMan gravatar image

It looks like that the internal Zscaler communication ( is blocked.

Have you configured the firewall bypass rules for the Zscaler processes as mentioned here:

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Brilliant, thank you. That's what it is. Good old Windows firewall. Thanks for the advice :-)

balcee gravatar imagebalcee ( 2021-03-30 09:24:32 +0000 )edit

@balcee, now I've converted the comment to an answer, could you accept it by clicking the checkmark next to it, this helps others who may have a similar question.

grahamb gravatar imagegrahamb ( 2021-03-30 12:35:43 +0000 )edit

@grahamb Thank you. There's no way for the comment owner or other users to do this by themselves, right?

JasMan gravatar imageJasMan ( 2021-03-30 12:56:39 +0000 )edit

@JasMan, if you don't see the link "convert to answer" at the bottom of the comment, then I guess it's reserved for Admins or if you have enough Karma. I'm not sure what the required level is though.

While we'd like to enable more things for users to do themselves, we can't have good things because of the SPAMmers.

grahamb gravatar imagegrahamb ( 2021-03-30 13:28:57 +0000 )edit

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Asked: 2021-03-23 19:37:09 +0000

Seen: 1,337 times

Last updated: Mar 28 '21