Varnish 503 Error

[rabillion]

We are using IntegerNet_SansecWatch on our multistore with Hyva theme and today we installed the Basecom_CspSplitHeader module.
For the configuration we used the approximate header size, also tried lower values and as soon as we enable it, the storefront returns a Varnish 503 error.
Restarting and clearing the Varnish cache did not help. Are there any configuration rules for Varnish that are necessary?

[lsiebels]

Hi @rabillion,

you would probably have to increase the maximum allowed header size of Varnish.

Unfortunately, I don't know the name of the value that needs to be adjusted.

[mfickers]

@rabillion, Try increasing http_resp_hdr_len for Varnish. It's set to 8kb per default.

[lsiebels]

@rabillion Is there any news? I hope you were able to solve your problem.

If increasing http_resp_hdr_len was the solution, I would update the README.

[jonashrem]

I can confirm http_resp_hdr_len needs to be increased for varnish

[lsiebels]

I am closing the issue. The problem has been added to the readme as a known issue.