The website suddenly can't be opened, but it can be pinged, DNS resolution, there should be no problem,
Open it with Google Chrome and it says "Connection is reset", without the corresponding IP, the request header still shows "no-referrer-when-downgrade"
It is normal to open a website with a mobile phone, and it is normal to open a server with a server. I don't know why
tracetcp is a command-line utility that uses traceroute Win32 TCP SYN packets instead of ICMP, UDP packets, which are commonly used in implementations to bypass the gateway traditional traceroute packet block.
Introduction to the Port Availability Probe tool in Windows environment
In Windows environments, you can use tracetcp to detect port availability.
tracetcp also does link probing by sending TCP packets toAnalyze whether the link intermediate node blocks the destination port。
Download and install
tracetcp usageDepends on the WinPcap libraryTherefore, you need to go to the official website to download it.
WinPcap download address: https://www.winpcap.org/
will be downloadedtracetcp-related files directly to the C:\Windows directory。 (If you extract to a non-system directory, you need to manually modify the system environment variables to ensure that the instructions can be called directly)
How to use:
Double-click to open the tracetcp application, the common uses of tracetcp are as follows:
tracetcp < target server domain name or <待探测端口号>IP >:
example
For more tracetcp parameter descriptions, you can use tracetcp -? Get and view.
Port availability probe steps
Typically, you can:
According to the previous description, use the corresponding tool to detect the availability of the destination port of the destination address.
Troubleshoot and analyze the detection results to determine abnormal nodes.
Query the website through IP addresses such as ip.taobao.com to obtain the operator and network of the corresponding node.
Or submit a ticket, and Alibaba Cloud will provide you with feedback to the relevant operators.
Brief analysis of link test results
Exception node determination method: If the relevant port is blocked in a certain hop, no data will be returned in each subsequent hop. Based on this, the abnormal node can be determined.
Example 1
In the above detection data,The destination port is inNo data is returned after the 3rd jump。 The port is blocked at the node。
Example conclusion: Because the node is a private IP address, it may be caused by the security policies related to the local network, and you need to contact the local network administrator for further investigation and analysis.
Example 2
In the above probe data, the destination port has no data returned after hop 11. The port is blocked at the node.
tracetcp download:
Tourists, if you want to see the hidden content of this post, please Reply
GitHub address: https://github.com/SimulatedSimian/tracetcp
| 
Posted on 8/16/2017 1:01:03 PM
|
|
|
|
Landlord|
Posted on 8/12/2025 1:25:45 PM
|
Posted on 8/17/2017 6:46:10 AM
|
I've been looking for it for a long time, and I hope I can get it