1 端口限速
2 qos
3 限制nat连接数
4 在局域网络内抓包，找到使用bt下载的用户，切断他，不让他上网
1 端口限速
2 qos(IP段限速)
acl number 3010
rule 0 permit ip source 192.168.0.0 0.0.0.31
acl number 3011
rule 0 permit ip source 192.168.0.32 0.0.0.31
acl number 3012
rule 0 permit ip source 192.168.0.64 0.0.0.31
acl number 3013
rule 0 permit ip source 192.168.0.96 0.0.0.31
acl number 3014
rule 0 permit ip source 192.168.0.128 0.0.0.31
acl number 3015
rule 0 permit ip source 192.168.0.160 0.0.0.31
acl number 3016
rule 0 permit ip source 192.168.0.192 0.0.0.31
acl number 3017
rule 0 permit ip source 192.168.0.224 0.0.0.31
interface GigabitEthernet4/0
tcp mss 1024
ip address 192.168.1.254 255.255.255.0
arp send-gratuitous-arp 1
firewall packet-filter 3000 inbound
qos car inbound acl 3010 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3011 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3012 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3013 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3014 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3020 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3015 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3016 cir 5000000 cbs 5000000 ebs 0 green continue red discard
qos car inbound acl 3017 cir 5000000 cbs 5000000 ebs 0 green continue red discard

3 限制nat连接数   
connection-limit enable
connection-limit default permit
connection-limit default amount upper-limit 90 lower-limit 20