View source for Zimbra Admin Console error

=Zimbra Admin Console error= 
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{{KB|{{WIP}}|{{ZCS 8.8}}||||}} 
  
====Problem====
Getting "HTTP response status 429" error on Admin Console.

[[File:HTTP Response 429.jpg|500x350px|middle]]

=====Possible cause=====
* Due to the max requests reached to the configured value for HTTP DOS filter.
* Due to mis-configuration of DOS filter.


====Solution====

'''1.''' To override the issue, please modify below value, flush the cache and check the behavior once.
 su - zimbra
 zmprov mcf zimbraHttpDosFilterMaxRequestsPerSec 100
 zmprov fc all


'''2.''' DOS filter should be configured properly is as follows [Single server]:

 su - zimbra
 zmprov ms `zmhostname` zimbraMailTrustedIP ""
 zmprov ms `zmhostname` zimbraHttpThrottleSafeIPs ""
 zmprov mcf +zimbraMailTrustedIP 127.0.0.1
 zmprov mcf +zimbraMailTrustedIP SERVER_IP
 zmprov mcf +zimbraHttpThrottleSafeIPs SERVER_NETWORK/CIDR    #
 zmlocalconfig -e servlet_max_concurrent_http_requests_per_account=20
 zmcontrol restart
 
Note : # Involve to Network Engineer to calculate exact CIDR value.


{{SubmittedBy|Krishna M. Bhosale}}

{{Article Footer|ZCS 8.8|2020-06-24}}