Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

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Nam_Truong_3245's avatar
Nam_Truong_3245
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Jun 18, 2017

Client Certificate Authentication Big IP issue on iOS devices

Hi everyone,   We have 3 IIS servers running on HTTPS and load balanced with Big IP. We configured Client certificate authentication on the IIS servers (many-to-one, one client certificate can be...
application delivery
big-ip
security
Nam_Truong_3245's avatar
Nam_Truong_3245
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Jun 19, 2017

Hi jaikumar,

 

I just setup the test environment with Windows NLB and I see that the same issue also appears like the real environment with BigIP. iOS device which has more than 2 client certificates will be asked for certificate selection each time clicked on a link/item. I already set NLB in Windows Server to Affinity mode: "Single" but there's still no changes. So I wonder if this issue is from iOS (safari) itself or caused by the Load Balancer? Do you have any idea?