APAR status
Closed as program error.
Error description
IHS can be enabled to perform OCSP checking of client certificates, but there is no way to enable a cache.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All users of IBM HTTP Server * **************************************************************** * PROBLEM DESCRIPTION: When OCSP is configured in IHS, each * * SSL * * handshake with client authentication * * results in contacting the OCSP server. * **************************************************************** * RECOMMENDATION: * **************************************************************** When OCSP is configured in IHS, each SSL handshake with client authentication results in contacting the OCSP server. Note: On zOS, the System SSL OCSP cache defaults to enabled with 256 entries.
Problem conclusion
1) The directive "SSLOCSPCacheSize" was added to allow Linux/AIX/Wi users to configure an in-memory LRU OCSP response cache (and all to configure the cache size). The cache lifetime is dictated by the OCSP response (nextUpdate or HTTP cache headers). 2) On Linux/AIX/Windows, basic cache statistics can be viewed for t current process and virtualhost via /server-status. Example read_hit: 0, read_miss: 1, write_hit: 0, write_miss: 0, new: 0, promoted_hit: 0, promoted_event: 0, resume ratio: 0, hit rati cache hit ratio: Meaning: - read_hit: the number of times a valid current OCSP response in the cache and so no actual OCSP request was required. - read_miss: the number of times a valid current OCSP response found in the cache and so an actual OCSP request was required. - write_hit: the number of times a response was renewed in the this should match read_hit unless the response was found in the but could not be used for other reasons. - write_miss: the number of times a new response was added to cache. - new: the number of new OCSP requests requested this is write_miss - read_miss. - lost: the number of times an otherwise still valid cache entries lost due to lack of space. - promoted_hit: the number of times a promoted item was found in the cache. - promoted_event: the number of ocsp responses that were promoted - resume ratio: the ratio of renewed to all cache writes, the the better. - hit ratio: ratio of renewed cache hits that were used. Note: responses that have expired will not be used which can lower thi ratio. - cache hit ratio: percentage ratio of OCSP responses used from the cache compared to the total including cached and those from new requests. The fix for this APAR is targeted for inclusion in IBM HTTP Serv packs 8.5.5.24 and 9.0.5.17. For more information, see 'Recommen Updates for WebSphere Application Server': https://www.ibm.com/support/pages/node/715553
Temporary fix
Comments
APAR Information
APAR number
PH54894
Reported component name
IBM HTTP SERVER
Reported component ID
5724J0801
Reported release
850
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2023-06-01
Closed date
2023-06-06
Last modified date
2023-06-09
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
IBM HTTP SERVER
Fixed component ID
5724J0801
Applicable component levels
[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSEQTJ","label":"IBM HTTP Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"8.5","Line of Business":{"code":"LOB45","label":"Automation"}}]
Document Information
Modified date:
09 June 2023