我在发出命令时面临问题
ip6tables -A DDoS -j DROP
导致错误，如
root@TimeProvider:~# ip6tables -A DDoS -j DROP
ip6tables: Invalid argument.
Run `dmesg' for more information.
root@TimeProvider:~# dmesg|tail -n 20 ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ip6_tables: limit match: invalid size 40 != 48
ADDRCONF(NETDEV_UP):
mgmt0: link is not ready
mgmt0: Link is up - 1000/Full
ADDRCONF(NETDEV_CHANGE):
mgmt0: link becomes ready TMAC switching to SyncE slave mode on PHY 0 TMAC switching to SyncE master mode on PHY 1
mgmt0: no IPv6 routers present TMAC switching to SyncE slave mode on PHY 0 TMAC switching to SyncE master mode on PHY 1
eth0: no IPv6 routers present
eth1: no IPv6 routers present
ip6_tables: limit match: invalid size 40 != 48
是命令的语法错误还是系统错误？