An instance of SWIS v3 suddenly stop working from 07-02-2015. It looks like the service itself is in healthy status, but any access from client side will get http 403 Forbidden error.
Following steps have been taken,
1. Restart SWIS v3 service (no effect);
2. Change SWIS v3 service's 'logon as' to different accunts --- domain accounts, local system acount; (no effect);
3. Collect some svclog, but can't find any leads from it.
We need help to find a solution for this problem, it affects our 'Production' environment. Thanks in advance.