Linux4.1怎么做端口映射？请高手指点！

firegunman

我是光纤接入固定公网IP：61.XXX.XXX.XXX在eth0
内网IP：192.168.0.200在eth1我想映射内网里的192.168.0.253端口27015

运行
iptables -A PREROUTING -t nat -p tcp -d 61.XXX.XXX.XXX --dport 27015 -j DNAT --to 192.168.0.253
出现

[root@omain root]# iptables -A PREROUTING -t nat -p tcp -d 61.XXX.XXX.XXX --dport 27015 -j DNAT --to 192.168.0.253 /lib/modules/2.4.26-1/kernel/net/ipv4/netfilter/ip_tables.o: init_module: Device or resource busy Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters. You may find more information in syslog or the output from dmesg /lib/modules/2.4.26-1/kernel/net/ipv4/netfilter/ip_tables.o: insmod /lib/modules/2.4.26-1/kernel/net/ipv4/netfilter/ip_tables.o failed /lib/modules/2.4.26-1/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables failed iptables v1.2.8: can't initialize iptables table `nat': iptables who? (do you need to insmod?) Perhaps iptables or your kernel needs to be upgraded.

不知道是怎么回事，请高手指点一下啊！