VARIOUS METHODS AND APPARATUSES FOR A CENTRAL STATION TO ALLOCATE VIRTUAL IP ADDRESSES

• US 20100241762A1
• Filed: 10/24/2008
• Published: 09/23/2010
• Est. Priority Date: 10/24/2007
• Status: Abandoned Application

• Current Assignee: Lantronix Incorporated
• Original Assignee: Lantronix Incorporated
• Inventors: Sung, Danny Te-An, Deutsch, Jonathan Peter
• Application Number:
  US12/306,145
• Publication Number:
  US 20100241762A1
• Time in Patent Office: Days
• US Class Current: 709/245
• CPC Class Codes: H04L 41/0806 for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 61/2514 between local and global IP addresses
• CPC Class Codes: H04L 61/2517 using port numbers
• CPC Class Codes: H04L 61/2528 Translation at a proxy
• CPC Class Codes: H04L 63/029 Firewall traversal, e.g. tunnelling or, creating pinholes
• CPC Class Codes: H04L 67/34 involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416

Abstract

A method, apparatus, and system are described for a central station to allocate virtual IP addresses. A device service manager server (DSM) has a network access module configured to cooperate with two or more device service controllers (DSCs). The DSM serves as a central management station for allocating and assigning Virtual IP addresses to network devices to proxy communications for networked devices on a local area network (LAN) where each DSC resides. The DSM is located exterior from the network devices on the LAN where communications associated with the assigned VIP addresses are being routed to. The DSM assigns a Virtual IP Addresses to each DSC and establishes a route from the assigned Virtual IP address to a destination network device on a LAN, based on corresponding DSC and network device information stored in a registry of the DSM.

Claims

1. An apparatus, comprising:

a device service manager server (DSM) having a network access module configured to cooperate with two or more device service controllers (DSCs) and serve as a central management station for allocating and assigning Virtual IP addresses to network devices to proxy communications for networked devices on a local area network (LAN) where each DSC resides and the DSM is located exterior from the network devices on the LAN where communications associated with the assigned VIP addresses are being routed to, wherein the DSM assigns a first Virtual IP Addresses to a first DSC and establishes a route from the first Virtual IP address to a destination network device, based on corresponding DSC and network device information stored in a registry of the DSM.

2. The apparatus of claim 1, wherein the network access module in the DSM is configured to create a pairing of 1) each DSC'"'"'s unique identifier and the virtual IP address of the local network assigned with the DSC, the network access module also creates a pairing of 2) a real IP address of a destination network device and a unique identifier of a destination DSC on a second local area network, and the DSM stores these pairings in the registry of the DSM.

3. The apparatus of claim 1, wherein the DSM has a virtual IP address Routing Table in the DSM'"'"'s registry that stores at least real IP addresses of each DSC and the network devices on that local area network, which are designated as visible by a user of the local area network, and the Virtual IP addresses, and routes to devices, where the DSM uses the information in the virtual IP address Routing Table to map a virtual IP address assigned by the DSM to a real IP address associated with a given DSC to establish the route.

4. The apparatus of claim 2, wherein the DSC'"'"'s unique identifier may be a unique ID associated with each DSC, or a MAC address assigned to that DSC and the networked devices are located behind a firewall on a local area network relative to a location of the DSM on a wide area network.

5. The apparatus of claim 1, wherein the network access module of the DSM has code scripted to instruct a first DSC to find out what virtual IP addresses are available in its local network and then report those VIP addresses to an association manager in the DSM and the DSC obtains the VIP addresses using a local automatic address server, and then copies the VIP addresses back to the association manager in the DSM.

6. The apparatus of claim 3, wherein the network access module instructs DSC to use DHCP to pick up VIP addresses from a pool of VIP address pre-identified by DSC to DSM and the network access module automatically updates routing information in the VIP Routing Table to be able to map real IP addresses with assigned VIP addresses and store that association in the DSM registry.

7. The apparatus of claim 6, wherein an association pairing is held stored while a connection is active and then placed in a queue of stored pairs until replaced by new active connection needing a pairing and then overwritten on a least frequently used basis.

8. The apparatus of claim 1, wherein network access manager in the DSM establishes a route from a domain name to a remote target Device via address mapping service via a Dynamic DNS to set up a domain name pointing to the virtual IP address and maps the specified pairing of the Virtual IP address assigned to first DSC and its unique ID to the pairing of the IP address assigned to a second DSC and its unique associated with the domain name.

9. The apparatus of claim 1, wherein the network access manager in the DSM cooperates with a domain name server to update one or more address records in the DNS to allow automatic domain name-to-IP address resolution and the DNS is communicatively connected and operated by the DSM and creates a virtual IP address for each active connection.

10. The apparatus of claim 1, wherein the network access manager in the DSM cooperates with a domain name server and the DNS merely needs to allocate a virtual IP address when a DNS query occurs, where a first DSC pre-allocates a pool of VIP addresses available in its LAN, then sends the pool of VIP addresses to the DSM and the DSM assigns and uses VIP address entries from the pool as needed.

11. The apparatus of claim 1, wherein a first DSC pre-allocates a pool of VIP addresses available in its LAN, then sends the pool of VIP addresses to the DSM and the DSM maintains two pools for assigning Virtual IP addresses, a smaller pool of VIP addresses used for requests from unknown public IP addresses and a larger pool of VIP addresses used for requests from known IP addresses registered with the DSC.

12. The apparatus of claim 1, wherein the network access manager in the DSM cooperates with a network manifold in each DSC to set up a virtual IP address for each DSC, and can then handle TCP/IP connections to any arbitrary port on any target device and the network manifold is configured to manage the VIP address pool for the LAN that DSC resides on.

13. A method, comprising

cooperating with two or more device service controllers (DSCs) on a local area network (LAN) where each DSC resides and a first DSC proxies communications for network devices on a first LAN;

instructing a first DSC to obtain available local virtual IP addresses from a device that is located exterior from the LAN where each DSC resides;

allocating and assigning Virtual IP addresses to network devices to proxy communications for the networked devices on the first local area network (LAN) where the first DSC resides;

instructing a second DSC to obtain available local virtual IP addresses from the device that is located exterior from the LAN where each DSC resides;

allocating and assigning Virtual IP addresses to network devices to proxy communications for the networked devices on the second local area network (LAN) where the second DSC resides;

storing a first pair of an assigned virtual IP address assigned to the first DSC and some unique identifying information regarding the first DSC in the device;

storing a second pair of an assigned virtual IP address assigned to the second DSC and some unique identifying information regarding the second DSC in the device; and

establishing a route from the assigned Virtual IP address to a destination network device on a LAN associated with a given DSC, based on stored pairs of information stored in the device.

14. The method of claim 13, further comprising:

creating a pairing of

     1) each DSC'"'"'s unique identifier and the virtual IP address of the local network assigned with the DSC,

     2) a unique identifier of host DSC controller and a real IP address of a host console network device associated with the unique identifier of DSC on a first local area network, as well as a pairing of

     3) a real IP address of a destination network device and a unique identifier of a destination DSC on a second local area network;

storing these pairings in a registry of the device; and

mapping these stored pair to establish a route from first DSC to the destination network device.

15. The method of claim 14, further comprising:

creating two or more pools of virtual IP address available in the local network, wherein a smaller pool of VIP addresses used for requests from unknown public IP addresses and a larger pool of VIP addresses used for requests from known IP addresses registered with the DSC.

16. A system, comprising:

a device service manager server (DSM) having a network access module configured to establish communications with two or more device service controllers (DSCs) and serve as a central management station for allocating and assigning virtual IP addresses to network devices to proxy communications for networked devices on a local area network (LAN) where each DSC resides and the DSM is located exterior from the network devices on the LAN where communications associated with the assigned virtual IP addresses are being routed to; and

a first DSC of the two or more DSCs, wherein the DSM instructs the first DSC to obtain available local virtual IP addresses in the local area network in which the first DSC resides and then report those available local virtual IP addresses back to the DSM, wherein the DSM assigns a first virtual IP Addresses to the first DSC and establishes a route from a first virtual IP address assigned to the first DSC to a destination network device, based on corresponding DSC and network device information stored in a registry of the DSM.

17. The system of claim 16, wherein the network access module in the DSM is configured to create a pairing of 1) each DSC'"'"'s unique identifier and the virtual IP address of the local network assigned with the DSC, the network access module also creates a pairing of 2) a unique identifier of a host DSC controller and a real IP address of a host console network device associated with the unique identifier of DSC on a first local area network, as well as a pairing of 3) a real IP address of a destination network device and a unique identifier of a destination DSC on a second local area network, and the DSM stores these pairings in the registry of the DSM, and the networked devices are located behind a firewall on a local area network relative to a location of the DSM on a wide area network.

18. The system of claim 16, wherein the DSC obtains the VIP addresses using a local automatic address server, and then copies the VIP addresses back to an association manager in the DSM, which updates a VIP Routing Table in the DSM.

19. The system of claim 16, wherein the network access module instructs DSC to use DHCP to pick up VIP addresses from a pool of VIP address pre-identified by DSC to DSM and the network access module automatically updates routing information in the VIP Routing Table to be able to map real IP addresses with assigned VIP addresses and store that association in the DSM registry and an association pairing is held stored while a connection is active and then placed in a queue of stored pairs until replaced by new active connection needing a pairing and then overwritten on a least frequently used basis.

20. The system of claim 16, further comprising:

a domain name server (DNS), wherein the network access manager in the DSM cooperates with the DNS and the DNS merely needs to allocate a virtual IP address when a DNS query occurs, where a first DSC pre-allocates a pool of VIP addresses available in its LAN, then sends the pool of VIP addresses to the DSM and the DSM assigns and uses VIP address entries from the pool as needed.