VPN Probing in Checkpoint
Use probing method
If a gateway has multiple IP addresses available for VPN traffic, then the correct address for
VPN is discovered through one of the following probing methods:
Using ongoing probing - When a session is initiated, all possible destination IP addresses
continuously receive RDP packets until one of them responds. Connections go through the
first IP to respond (or to a primary IP if a primary IP is configured and active), and stay with
this IP until the IP stops responding. The RDP probing is activated when a connection is
opened and continues as a background process.
Using one time probing - When a session is initiated, all possible destination IP addresses
receive a lone RDP session to test the route. The first IP to respond is chosen, and stays
chosen until the next time a policy is installed.
For both the probing options (one-time and ongoing) a Primary Interface can be assigned. If
not all of a gateway's interfaces are used for VPN, a smaller set of interfaces can be selected.
Use probing method
If a gateway has multiple IP addresses available for VPN traffic, then the correct address for
VPN is discovered through one of the following probing methods:
Using ongoing probing - When a session is initiated, all possible destination IP addresses
continuously receive RDP packets until one of them responds. Connections go through the
first IP to respond (or to a primary IP if a primary IP is configured and active), and stay with
this IP until the IP stops responding. The RDP probing is activated when a connection is
opened and continues as a background process.
Using one time probing - When a session is initiated, all possible destination IP addresses
receive a lone RDP session to test the route. The first IP to respond is chosen, and stays
chosen until the next time a policy is installed.
For both the probing options (one-time and ongoing) a Primary Interface can be assigned. If
not all of a gateway's interfaces are used for VPN, a smaller set of interfaces can be selected.
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