buffer (buffer closure): buffer for incoming packets
authbind (string): optional, path to authbind-helper program
buffer (buffer closure): buffer for incoming packets
authbind (string): optional, path to authbind-helper program
secnet-address (string): IP address of this netlink device
mtu (integer): MTU of host's tunnel interface
secnet-address (string): IP address of this netlink device
mtu (integer): MTU of host's tunnel interface