为什么tcp服务器在接受连接后立即发送fin和ack [英] Why will a tcp server send a fin and ack immediately after accepting a connection

问题描述

为什么TCP服务器会在接受连接后立即发送FIN和ACK：

Why will a TCP Server send a FIN and ACK immediately after accepting a connection:

Client->Server: SYN
Server->Client：SYN,ACK
Client->Server：ACK
Server->Client: FIN,ACK

运行tracert 127.0.0.1：

run "tracert 127.0.0.1":

Through up to 30 jump points tracking
Route to [127.0.0.1] AM-201501021331:
1 <1 MS <1 MS <1 MS AM-201501021331 [no resources]
Track completion.

为什么结果是没有资源;



我尝试过：



运行tracert 127.0.0.1，结果是没有资源

why result is "no resources";

What I have tried:

run "tracert 127.0.0.1", result is "no resources"

推荐答案

[no resources]显示而不是IP地址[127.0.0.1]。虽然跟踪本身是成功的，但它表明存在某种问题。



您可以执行

"[no resources]" is displayed instead of the IP address "[127.0.0.1]". While the tracing itself was succesful it indicates some kind of problem.

You may execute

nslookup 127.0.0.1

进一步调查并重复使用名称 localhost 和 AM-201501021331 （您的计算机名称） 。



可能的原因是没有DNS服务器配置/可用，甚至没有网络连接。



至少您可以执行tracert并选择禁用反向名称查找：

for further investigation and repeat that with the names localhost and AM-201501021331 (your computer's name).

Possible reasons are no DNS server configured / available or even no network connection.

At least you can execute tracert with an option to disable reverse name lookup:

tracert -d 127.0.0.1

nslookup 127.0.0.1
Server: UnKnown
Address: 10.1.33.7

name: localhost
Address: 127.0.0.1

运行tracert -d 127.0.0.1，结果也是无资源;

run "tracert -d 127.0.0.1", result is "no resources" too;

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