Systems and methods for a unique mechanism of providing ‘clientless SSLVPN’ access to a variety of web-applications through a SSLVPN gateway

A system for rewriting a hypertext transfer protocol (HTTP) response transmitted via a clientless secure socket layer virtual private network (SSL VPN) session, the system comprising:

• a policy engine, comprising a hardware processor, executable on a device intermediary between a client and a server, configured to identify in a HTTP response transmitted via a clientless SSL VPN session, an absolute uniform resource locator (URL) that includes a first hostname of the server, the device having a second hostname;
• an encoder executable on the device, configured to provide a unique string corresponding to the first hostname of the server;
• a rewriter executable on the device, configured to:
• generate a URL segment by combining the unique string with the second hostname of the device,
• rewrite the absolute URL by replacing the first hostname in the absolute URL with the generated URL segment, and
• provide a domain name system (DNS) server with a DNS entry to resolve the rewritten absolute URL to an internet protocol (IP) address of the device, the DNS entry comprising a wildcard prefixed to the second hostname, the wildcard resolving with a string prior to the second hostname in the rewritten absolute URL which includes the unique string corresponding to the first hostname of the server, to route to the device corresponding to the second hostname;
• a receiver executable on the device, configured to receive, from the client, a request to access the server, the request including the rewritten absolute URL, the request routed to the device by the DNS server using the DNS entry to resolve the rewritten absolute URL to the IP address of the device;
• and a decoder executable on the device, configured to decode, using the first hostname, the URL segment in the rewritten absolute URL of the request, to communicate with the server.