By forwarding a port you can overcome this limitation. We have free Router Detector software to help you find your router's IP address. It's a part of the Network Utilities suite of tools and it's completely free to use. A smart way to forward your ports is to use Network Utilities. With Network Utilities , you can easily forward ports and also un-forward ports quickly so that you can keep your network up to date with the ports that you need forwarded and maximize your network security.
You can also choose to set up port forwards manually. The step-by-step process for forwarding a port is:. Forward some ports for Animal Crossing: New Horizons in your router for a better online mutiplayer experience.
QQ instant Messenger. I cannot get this through the dang firewall.. They seem to use alot of IP address, not domain name for servers. Nothing shows up in the web filter log, but they show up as drops in the firewall packet log.
Otherwise, it looks like everything is going to Dest port , so you could create a PacketFilter rule allowing traffic from the QQ pc s to port Up 0 Down Cancel. If Barry's prescription doesn't heal your ills, please post the same lines from the full Firewall log file When logging in using UDP, the port is Therefore, if your network is open to port 80 port 80 is the most commonly used port Server IP, congratulations, you can login QQ successfully. Second, the chat message communication uses UDP protocol, through the server transfer method.
Everyone knows that the UDP protocol is an unreliable protocol. It only sends, regardless of whether the other party receives it, but its transmission is very efficient.
However, as a chat software, how can this unreliable method be used to transmit messages? Therefore, Tencent adopted an upper layer protocol to ensure reliable transmission: if the client sends a message using the UDP protocol, the server receives the packet and needs to send back a response packet using the UDP protocol.
In this way, the message can be transmitted without missing. The reason why the client clearly sees "message failed to send" but the other party receives this message again is because the message sent by the client has been received and forwarded successfully, but the client did not receive the server due to network reasons Caused by the response packet. Because users are generally in the local area network, the addresses are private IP, How does the Tencent server forward information to users?
First, introduce some basic concepts: NAT Network Address Translators , network address translation: Network address translation is generated in the absence of IP addresses, its main purpose is to be able to Address reuse. At the beginning, NAT is a functional module running on the router. The first proposed is the basic NAT, which is based on the fact that there are only a few nodes in a private network domain that need to be connected to the external network hehe, this was proposed in the mids.
In fact, only a few nodes in this subnet need a globally unique IP address, and the IP addresses of other nodes should be reusable.
Therefore, the basic function of NAT is very simple. Use a reserved IP subnet segment in the subnet. These IPs are not visible to the outside world. Only a few IP addresses in the subnet can correspond to truly global unique IP addresses.
If these nodes need to access the external network, then basic NAT is responsible for converting the IP in this node's subnet into a globally unique IP and sending it out. Look at the picture below: Server S1 And UDP, with the first port of this IP UDP starts and ends, hehe, maybe a few minutes, maybe a few hours, it depends on the specific implementation and assign a port to this Session, such as , and then change the source port of this packet to
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