Generating proxy automatic configuration scripts

1. A computer-implemented method executed by one or more processors, the method comprising:

receiving, by a network manager on a network, a request for a proxy automatic configuration (PAC) script from a source address associated with a device;

determining, by the network manager and based on the source address, whether (i) the device is on a network local to the network manager or (ii) the device is not on a network local to the network manager by determining if (i) the source address is a local network address or (ii) the source address is a public network address;

generating, by the network manager, a PAC script based at least in part on the determination of whether or not the device is on a network local to the network manager, wherein:

if the device is on a network local to the network manager, the PAC script includes instructions configured to route traffic addressed outside the network local to the network manager through a proxy and to route traffic addressed inside the network without going through the proxy; and

if the device is not on a network local to the network manager, the PAC script includes instructions configured to route network traffic directly to network resources; and

sending, by the network manager, a response to the request for the PAC script including the generated PAC script.

2. The method of claim 1 , wherein determining whether (i) the device is on a network local to the network manager or (ii) the device is not on a network local to the network manager includes determining whether the device is on-premise or off-premise.

3. The method of claim 1 , wherein receiving the request for the PAC script includes receiving a Hypertext Transfer Protocol (HTTP) request, and the source address is an Internet Protocol (IP) address.

4. The method of claim 1 , wherein the network manager receives requests for PAC scripts from a plurality of source addresses, each source address associated with a different device.

5. A system comprising:

a processor configured to execute computer program instructions; and

a tangible, non-transitory computer storage medium encoded with computer program instructions that, when executed by the processor, cause the system to perform operations comprising:

receiving, by a network manager on a network, a request for a proxy automatic configuration (PAC) script from a source address associated with a device;

determining, by the network manager and based on the source address, whether (i) the device is on a network local to the network manager or (ii) the device is not on a network local to the network manager by determining if (i) the source address is a local network address or (ii) the source address is a public network address;

generating, by the network manager, a PAC script based at least in part on the determination of whether or not the device is on a network local to the network manager, wherein:

if the device is on a network local to the network manager, the PAC script includes instructions configured to route traffic addressed outside the network local to the network manager through a proxy and to route traffic addressed inside the network without going through the proxy; and

if the device is not on a network local to the network manager, the PAC script includes instructions configured to route network traffic directly to network resources; and

sending, by the network manager, a response to the request for the PAC script including the generated PAC script.

6. The system of claim 5 , wherein determining whether (i) the device is on a network local to the network manager or (ii) the device is not on a network local to the network manager includes determining whether the device is on-premise or off-premise.

7. The system of claim 5 , wherein receiving the request for the PAC script includes receiving a Hypertext Transfer Protocol (HTTP) request, and the source address is an Internet Protocol (IP) address.

8. The system of claim 5 , wherein the network manager receives requests for PAC scripts from a plurality of source addresses, each source address associated with a different device.

9. A non-transitory, computer-readable medium storing instructions operable when executed to cause at least one processor to perform operations comprising:

receiving, by a network manager on a network, a request for a proxy automatic configuration (PAC) script from a source address associated with a device;

determining, by the network manager and based on the source address, whether (i) the device is on a network local to the network manager or (ii) the device is not on a network local to the network manager by determining if (i) the source address is a local network address or (ii) the source address is a public network address;

generating, by the network manager, a PAC script based at least in part on the determination of whether or not the device is on a network local to the network manager, wherein:

if the device is on a network local to the network manager, the PAC script includes instructions configured to route traffic addressed outside the network local to the network manager through a proxy and to route traffic addressed inside the network without going through the proxy; and

if the device is not on a network local to the network manager, the PAC script includes instructions configured to route network traffic directly to network resources; and

sending, by the network manager, a response to the request for the PAC script including the generated PAC script.

10. The computer readable medium of claim 9 , wherein determining whether (i) the device is on a network local to the network manager or (ii) the device is not on a network local to the network manager includes determining whether the device is on-premise or off-premise.

11. The computer readable medium of claim 9 , wherein the network manager receives requests for PAC scripts from a plurality of source addresses, each source address associated with a different device.