Traversing firewalls

• US 9,866,531 B2
• Filed: 07/06/2015
• Issued: 01/09/2018
• Est. Priority Date: 03/21/2003
• Status: Active Grant

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Perkins, Gregory Eugene, Reese, Curtis
• Primary Examiner(s): Abyaneh, Ali
• Application Number:
  US14/792,290
• Publication Number:
  US 20150312218A1
• Time in Patent Office: 918 Days
• CPC Class Codes: H04L 41/0213 Standardised network management protocols, e.g. simple network management protocol [SNMP]
• CPC Class Codes: H04L 41/026 using e-messaging for transporting management information, e.g. email, instant messaging or chat
• CPC Class Codes: H04L 41/08 Configuration management of networks or network elements address allocation H04L61/50
• CPC Class Codes: H04L 43/0811 by checking connectivity
• CPC Class Codes: H04L 51/18 Commands or executable codes
• CPC Class Codes: H04L 63/02 for separating internal from external traffic, e.g. firewalls
• CPC Class Codes: H04L 63/029 Firewall traversal, e.g. tunnelling or, creating pinholes
• CPC Class Codes: H04L 67/141 Setup of application sessions admission control or resource allocation in data switching networks H04L47/70

Abstract

A remote administrator device is provided outside a firewall that prevents remote devices from accessing, but allows remote devices to send electronic mail messages to a plurality of local network devices. The remote administrator device can send an electronic mail message to a respective one of the plurality of local network devices behind the firewall. The electronic mail message can include instructions for the respective local network device to establish a connection with the remote administrator device through the firewall. Once the connection is established, the remote administrator device can monitor state data received over the connection for the respective local network device.

Claims

1. A method of traversing a firewall, the method performed by a hardware processor of a remote administrator device and comprising:

generating an access request for a respective one of the plurality of local network printers behind the firewall;

sending a polling mail message to the respective local network printer, the polling mail message comprising timing instructions for when the respective local network printer is to establish a connection with the remote administrator device located outside the firewall in order to poll for access requests, wherein the firewall prevents remote devices from accessing, but allows remote devices to send electronic mail messages to the plurality of local network printers; and

based on the respective local network printer establishing a connection with the remote administrator device in accordance with the timing instructions of the polling mail message, receiving and monitoring state data for the respective local network printer, the state data being received over the connection.

2. The method of claim 1, wherein the polling mail message comprises credentials identifying the remote administrator device as a source of the polling mail message.

3. The method of claim 2, wherein the credentials comprise a digital signature that enables the respective local network printer to authenticate the remote administrator device.

4. The method of claim 1, further comprising:

at least partially adjusting the state data automatically; and

sending the adjusted state data to the respective local network printer over the connection with an instruction to apply the adjusted state data to settings of the respective local network printer.

5. The method of claim 4, wherein the settings comprise configurable default settings of the respective local network printer, and wherein the instruction to apply the adjusted state data causes the respective local network printer to adjust the configurable default settings.

6. The method of claim 5, wherein the configurable default settings comprise at least one of duplexing settings, print resolution settings, paper source settings, and finishing settings.

7. The method of claim 1, further comprising:

generating a user interface comprising control features to enable a user to adjust the state data; and

sending the adjusted state data to the respective local network printer over the connection with an instruction to apply the adjusted state data to settings of the respective local network printer.

8. A remote administrator device comprising:

a hardware processor; and

a memory storing instructions that, when executed by the hardware processor located outside a firewall, cause the remote administrator device to;

generate an access request for a respective one of a plurality of local network printers behind the firewall;

send a polling mail message to the respective local network printer, the polling mail message comprising timing instructions for when the respective local network printer is to establish a connection with the remote administrator device in order to poll for access requests, wherein the firewall prevents remote devices from accessing, but allows remote devices to send electronic mail messages to the plurality of local network printers; and

based on the respective local network printer establishing a connection with the remote administrator device in accordance with the timing instructions of the polling mail message, receive and monitor state data for the respective local network printer, the state data being received over the connection.

9. The remote administrator device of claim 8, wherein the polling mail message comprises credentials identifying the remote administrator device as a source of the polling mail message.

10. The remote administrator device of claim 9, wherein the credentials comprise a digital signature that enables the respective local network printer to authenticate the remote administrator device.

11. The remote administrator device of claim 8, wherein the executed instructions further cause the remote administrator device to:

at least partially adjust the state data automatically; and

send the adjusted state data to the respective local network printer over the connection with an instruction to apply the adjusted state data to settings of the respective local network printer.

12. The remote administrator device of claim 11, wherein the settings comprise configurable default settings of the respective local network printer, and wherein the instruction to apply the adjusted state data causes the respective local network printer to adjust the configurable default settings.

13. The remote administrator device of claim 12, wherein the configurable default settings comprise at least one of duplexing settings, print resolution settings, paper source settings, and finishing settings.

14. A non-transitory computer readable medium storing instructions that, when executed by a hardware processor of a remote administrator device located outside a firewall, cause the remote administrator device to:

generate an access request for a respective one of a plurality of local network printers behind the firewall;

send a polling mail message to the respective one of a plurality of local network printer, the polling mail message comprising timing instructions for when the respective local network printer is to establish a connection with the remote administrator device in order to poll for access requests, wherein the firewall prevents remote devices from accessing, but allows remote devices to send electronic mail messages to the plurality of local network printers; and

based on the respective local network printer establishing a connection with the remote administrator device in accordance with the timing instructions of the polling mail message, receive and monitor state data for the respective local network printer, the state data being received over the connection.