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Cedar: Add "DefaultGateway" and "DefaultSubnet" virtual hub options

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WireGuard does not provide any configuration messages, meaning that we cannot push the IP address we receive from the DHCP server to the client.

In order to overcome the limitation we don't perform any DHCP operations and instead just extract the source IP address from the first IPv4 packet we receive in the tunnel.

The gateway address and the subnet mask can be set using the new "SetStaticNetwork" command. The values can be retrieved using "OptionsGet".

In future we will add a "allowed source IP addresses" function, similar to what the original WireGuard implementation provides.

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SetStaticNetwork command - Set Virtual Hub static IPv4 network parameters
Help for command "SetStaticNetwork"

Purpose:
  Set Virtual Hub static IPv4 network parameters

Description:
  Set the static IPv4 network parameters for the Virtual Hub. They are used when DHCP is not available (e.g. WireGuard sessions).
  You can get the current settings by using the OptionsGet command.

Usage:
  SetStaticNetwork [/GATEWAY:gateway] [/SUBNET:subnet]

Parameters:
  /GATEWAY - Specify the IP address of the gateway that will be used for internet communication.
  /SUBNET  - Specify the subnet mask, required to determine the size of the local VPN network.
This commit is contained in:
Davide Beatrici
2020-09-01 03:04:14 +02:00
parent decfcecc97
commit afe576dcdc
14 changed files with 171 additions and 10 deletions
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13
src/bin/hamcore/strtable_en.stb
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@ -5082,6 +5082,16 @@ CMD_Offline_Help Use this when the Virtual Hub currently being managed is onlin
CMD_Offline_Args Offline
# SetStaticNetwork command
CMD_SetStaticNetwork Set Virtual Hub static IPv4 network parameters
CMD_SetStaticNetwork_Help Set the static IPv4 network parameters for the Virtual Hub. They are used when DHCP is not available (e.g. WireGuard sessions). \nYou can get the current settings by using the OptionsGet command.
CMD_SetStaticNetwork_Args SetStaticNetwork [/GATEWAY:gateway] [/SUBNET:subnet]
CMD_SetStaticNetwork_GATEWAY Specify the IP address of the gateway that will be used for internet communication.
CMD_SetStaticNetwork_SUBNET Specify the subnet mask, required to determine the size of the local VPN network.
CMD_SetStaticNetwork_Prompt_GATEWAY Gateway:
CMD_SetStaticNetwork_Prompt_SUBNET Subnet mask:
# SetMaxSession command
CMD_SetMaxSession Set the Max Number of Concurrently Connected Sessions for Virtual Hub
CMD_SetMaxSession_Help Use this to set the maximum number of sessions that can be concurrently connected to the Virtual Hub that is currently being managed. When there are more sessions than the maximum number of concurrently connected sessions that are being connected from the VPN Client or VPN Bridge, when the maximum number of sessions is reached, clients will no longer be able to connect. This limit on the maximum number of concurrently connected sessions does not include sessions generated in the Virtual Hub by Local Bridges, Virtual NAT, and Cascade Connections. \nYou can get the current setting for the max number of concurrently connected sessions by using the OptionsGet command. \nThis command cannot be run on VPN Bridge. \nYou cannot execute this command for Virtual Hubs of VPN Servers operating as a cluster.
@ -5118,7 +5128,8 @@ CMD_OptionsGet_ENUM Enumeration of Virtual Hub for Anonymous User
CMD_OptionsGet_MAXSESSIONS Max Number of Sessions
CMD_OptionsGet_STATUS Status
CMD_OptionsGet_TYPE Virtual Hub Type
CMD_OptionsGet_GATEWAY Default gateway
CMD_OptionsGet_SUBNET Default subnet
# RadiusServerSet command