'intermittent ERR_CONNECTION_REFUSED 401 in IIS

Windows server 2012 R2 Classic ASP + PHP

Used to be ok, but recently the problem appeared We are getting intermittent (every 3rd or 5th request) fails with 401 2 64 error. Tried disabling windows auth, but still the same. Does not seem to be affected by browser choice.

Sometimes it cures itself but then comes back.

Please help if you have any ideas! Thank you!



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