CRL Overlap Confusion

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confusion.....

is required have crl overlap periods set; base and/or delta crls?
i think read default value 10% of crl period.  

i have customer's pki has following set.  not best practice?  should implement overlaps?  considering changing max-age setting on iis refresh client caches more frequently.

root ca:
crlperiodunits 1
crlperiod "years"
crldeltaperiodunits 0
crldeltaperiod "days"

issuing/policy ca:
crlperiodunits 1
crlperiod "weeks"
crldeltaperiodunits 1
crldeltaperiod "days"

> required have crl overlap periods set; base and/or delta crls?

this depends on network configuration. overlap settings used resolve ad/dfs replication latency. if crls published ad there may replication latency while cdp container or dfs share replicated endpoints. value of latency may vary several hours.

> think read default value 10% of crl period

no, isn't correct.

for additional information please check following link: http://blogs.technet.com/pki/archive/2008/06/05/how-effectivedate-thisupdate-nextupdate-and-nextcrlpublish-are-calculated.aspx

you can implement base crl overlap root ca 2 weeks value. means when ca issue new crl, have 2 weeks distribute new crl crl distribution points. online cas can set overlap 1 day base crl.

http://www.sysadmins.lv


Windows Server  >  Security



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