ZBFW: UDP timeout config for VPN

[pingduck]

I have an IPsec VPN config which uses UDP 500 and UDP 4500. After adding a basic ZBFW config to block unsolicited incoming connection. I noticed my VPN is flapping occasionally. Since it does not occur consistently, I suspect it has to do with session timeout.

This is a VPN client, I do not want to add bypass for all UDP 500/4500 traffic. Is there a global config for ZBFW UDP timeout? The CBAC config "ip inspect udp idle-time 60" does not work anymore.\

On a related note, what is the default UDP session timeout for ZBFW?

[pingduck · Accepted solution]

Answering my own question here:

Base on my experiment, the default UDP session timeout is 30s. And here is the way to change the UDP session timeout for ZBFW:

parameter-map type inspect default

  udp idle-time 60