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As noted earlier, a node running Gurobi Remote Services communicates with clients through a REST protocol over HTTP or HTTPS using a single port. It uses standard port 80 for HTTP or 443 for HTTPS by default, but you can choose an arbitrary port through the PORT configuration property. If there is a firewall between the clients and the nodes of the cluster, the chosen port will have to be open.

The command line tools and the libraries are also compatible with standard proxy settings using environment variables HTTP_PROXY and HTTPS_PROXY. HTTPS_PROXY takes precedence over HTTP_PROXY for https requests. The values may be either a complete URL or a host[:port], in which case the http scheme is assumed.

If you face connectivity issues with firewalls or proxy servers, we suggest you share this section with your network administrator.

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