It is not possible to set a default gateway on a UDP Virtual Service. To set the default gateway for a UDP Virtual Service, use this workaround:
- Create a TCP Virtual Service with the same IP address (the port is irrelevant).
- Do not add any Real Servers.
- Set the default gateway for that Virtual Service. It will also affect the UDP Virtual Service (i.e. the required one).
Note: Default gateways only work on IP addresses, so having two Virtual Services with the same IP address and different default gateways does not work.