I have a PC trying to get a license from a remote license server that is on a different subnet run by a different department of the company. I have configured the IP address in the web UI of the Sentinel Admin Control Center under Configuration > Access to Remote License Managers. I know it is configured right because I can see the UDP and HTTP requests going out to the remote server's IP address on port 1947 using wireshark. However, the server never responds. I have reproduced this behavior by mimicking the request using curl. I then found that the request will go through if there is a Host: HTTP header line. Is this caused by a difference between my client and the server version? Has anyone heard of this problem? Another thought I had is that there is a firewall or anti-virus sitting between me and the server that isn't allowing the HTTP request to go through because it doesn't contain the Host header and is therefore malformed and dangerous. However, I've been assured that this is not the case by the server admins and that other people on other subnets can get licenses from the license server.
Thanks for any thoughts on this problem and feel free to ask for any additional information!