Verifying the configuration settings of the reverse proxy, including URL rewriting and port forwarding rules When encountering access issues with Tableau Server configured be-hind a reverse proxy, the first step should be to verify the proxy's configuration settings. This includes checking URL rewriting rules and port forwarding settings to ensure they are correctly routing traffic to and from Tableau Server. Misconfigurations in these settings can often lead to intermittent access problems. Option A is incorrect because increasing bandwidth is unlikely to resolve issues specifically related to proxy configuration. Option C is incorrect as changing the proxy soft-ware provider is not the first troubleshooting step and may not address the root cause of the issue. Option D is incorrect because installing a new SSL certificate on Tableau Server, while important for security, does not directly address proxy configuration issues.