protocolV4:
| "all"
| "tcp"
| "udp"
| "tcp_udp"
| "icmp"
| "ah"
| "ax.25"
| "dccp"
| "ddp"
| "egp"
| "eigrp"
| "encap"
| "esp"
| "etherip"
| "fc"
| "ggp"
| "gre"
| "hip"
| "hmp"
| "idpr-cmtp"
| "idrp"
| "igmp"
| "igp"
| "ip"
| "ipcomp"
| "ipencap"
| "ipip"
| "ipv6"
| "ipv6-frag"
| "ipv6-icmp"
| "ipv6-nonxt"
| "ipv6-opts"
| "ipv6-route"
| "isis"
| "iso-tp4"
| "l2tp"
| "manet"
| "mobility-header"
| "mpls-in-ip"
| "ospf"
| "pim"
| "pup"
| "rdp"
| "rohc"
| "rspf"
| "rsvp"
| "sctp"
| "shim6"
| "skip"
| "st"
| "udplite"
| "vmtp"
| "vrrp"
| "wesp"
| "xns-idp"
| "xtp"
| "number"
| string