I was in a UDP communication, when open the firewall, normal communication links, send and receive is normal, but after a period of time (after a few minutes), recvfrom (block) to receive the data,
But at the moment I network monitoring software can be normal receive the correct data,

Close the firewall, recvfrom success can receive data,
Want to know what this is because what reason?
In addition to close the firewall, whether there is any other solution treated with code?

CodePudding user response:

Now that sure is a problem of firewall, can you give me an insight into the use of firewall provide any strategy, function;
Limits can be completely based on time, frequency, flow and so on more than the typical variable