How can iptables allow QQ and aMule?

How can iptables allow QQ and aMule? -- Linux general technology-Linux technology and application information. For details, refer to the following section. For example, QQ cannot be accessed now, And aMule has no speed at all.
My personal computer is ADSL,

The rules are as follows:

Chain INPUT (policy DROP)
Target prot opt source destination
ACCEPT tcp -- anywhere tcp spt: www
ACCEPT udp -- anywhere udp spt: domain
ACCEPT tcp -- anywhere tcp spt: ftp
ACCEPT tcp -- anywhere tcp spt: 4662
ACCEPT tcp -- anywhere tcp spt: 4672
ACCEPT udp -- anywhere udp spt: 4662
ACCEPT udp -- anywhere udp spt: 4672
DROP icmp -- anywhere
ACCEPT udp -- anywhere udp spt: 8000
ACCEPT udp -- anywhere udp spt: 433
ACCEPT tcp -- anywhere tcp spt: 433
ACCEPT tcp -- anywhere tcp spt: 8000

Chain FORWARD (policy DROP)
Target prot opt source destination

Chain OUTPUT (policy ACCEPT)
Target prot opt source destination


PS,
The standard user TCP port of aMule is 4662, and the user UDP port is 4672;
QQ officially said that QQ for Linux needs to open ports 433,8000 and 80. Didn't I open ports?

Please share your iptables experience with cainiao who first came to know iptables.