RTP，防火墙后面和 Nat 后面的媒体数据包让生活很难修复它，现在我正在尝试进行 UDP 打洞，以摆脱它

发布于 2024-11-02 12:33:56 字数 1303 浏览 4 评论 0原文

我正在尝试创建一个对等 2 对等音频/视频应用程序，但在 NAT 和防火墙后面导致我的应用程序失败，我发现 Skype 做到了这一点，其他应用程序也采用了其他方法，然后我决定使用这种方法，这将允许我申请在 NAT 办公室/家庭后面工作。

UDP打洞：

到目前为止，尝试了hping2和netcat。服务器，pc1位于nat/firewall后面，pc2位于nat/firewall后面

local/1$ nc -u 14141 -l  # ME, step 1
remoteServer$ echo "hello" | nc -p 53 -u xx.23.xx.xx 14141  # My server, to say hello 
nc: Write error: No route to host    
local/2$ hping2 -c 1 -2 -s 14141 -p 53 xx.21.xx.xx # Me from second terminal making a hole
remoteServer$ echo "hello" | nc -p 53 -u xx.23.xx.xx 14141 # My server again say hell
local/1 $ nc -u 14141 -l # ME, step 1 was running and it received "hello" now
 hello

但是local/1如何在没有hping2的情况下获得hello，或者hping2到底是什么？有人可以建议吗？或者我如何使用这种方法让 A（本地）B（服务器）C（我的朋友）与对等 2 对等进行通信？

有用的链接： http://www.masquerade。 cz/en/nat-tunel-metodou-udp-hole-punching-v-jazyce-java/

后续： UPnP 是最好的解决方案吗？但它会寻找下一个跃点，因此在这种情况下，此路线图将会失败（如果我没记错的话）：

Me（在 NAT 后面）-> MyOffice（带有路由器），50 台笔记本电脑） -> ISP1 -> ISP2 -> FriendOffice（路由器，90 台笔记本电脑） -> 朋友（NAT 后面）

原文

I am trying to make a peer 2 peer audio/video application, but behind NAT and behind firewall causing my application failture, i figure out that Skype does it and other application does also other approach, then i decided to use this approach which will allow my application to work behind NAT office/home.

UDP Hole punching:

So far, tried hping2 and netcat. Server, pc1 behind nat/firewall and pc2 behind nat/firewall

local/1$ nc -u 14141 -l  # ME, step 1
remoteServer$ echo "hello" | nc -p 53 -u xx.23.xx.xx 14141  # My server, to say hello 
nc: Write error: No route to host    
local/2$ hping2 -c 1 -2 -s 14141 -p 53 xx.21.xx.xx # Me from second terminal making a hole
remoteServer$ echo "hello" | nc -p 53 -u xx.23.xx.xx 14141 # My server again say hell
local/1 $ nc -u 14141 -l # ME, step 1 was running and it received "hello" now
 hello

But local/1 how to get the hello, without hping2 or what is exactly hping2?
Can anyone suggest? Or how i can just do the A (local) B(server) C(my friend) communicate with peer 2 peer using this method?

Useful links:
http://www.masquerade.cz/en/nat-tunel-metodou-udp-hole-punching-v-jazyce-java/

Follow up:
UPnP is best solution? But it looks for the very next hop, so in that case it will fail for this road map (if i am not wrong):

Me (behind NAT) -> MyOffice (with router, 50 laptops) -> ISP1 -> ISP2 -> FriendOffice (router, 90 laptops) -> Friend (behind NAT)