Is the linux server inaccessible for multiple network segments?

Is the linux server inaccessible for multiple network segments? -- Linux general technology-Linux technology and application information. For details, refer to the following section. In a linux application server, clients of different network segments can access the server normally, but only machines of the same network segment can access the server recently. How can this problem be solved? The router has not made any settings, because it can be accessed before. No changes have been made on the server. That person knows how to answer this question!

An example is as follows:
Linux server address 10.3.32.4 Application website
All machines in the same network segment, that is, 32 segments, can be accessed, but cannot be pinged through 10.3.32.4 and 10.3.32.4.

The IP address range 10.3.35.x or 10.3.34.x cannot access the server 10.3.32.4 or ping the server.