This morning we installed the certificate renewal on our ACS 5.3 servers. The 
certificate is used for wireless PEAP authentication. After the renewal, we 
noticed some 5411 EAP timeout errors in ACS logs and the error mainly happened 
for Apple devices. When we checked it on one Iphone, it could not automatically 
connect to the wireless network (it used to connect automatically). Then we had 
to manually connect to the network again and acknowledge certificate on Iphone 
then it can connect. Android and Blackberry devices do not have this issue. I 
am thinking what we can do to make the certificate renewal process seamless. 
Has anyone experienced this issue as well and do you have any solutions? Thanks 
in advance. 

---
Dennis Xu
Analyst 3, Network Infrastructure
Computing and Communications Services(CCS)
University of Guelph

519-824-4120 Ext 56217
[email protected] 
www.uoguelph.ca/ccs

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