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My firewall is set up correctly and it also makes no difference if I completely turn off the firewall. But if I try with a "get pxelinux.0" command, I get another timeout message. If I manually make a TFTP connection to the PXE server from a local computer, I immediately get access to the server.
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However, when the boot files are to be retrieved from the TFTP server, a "TFTP open timeout" message comes. The boot process comes so far that I correctly get an IP address and a file name from the DHCP server. I cannot retrieve any files from the TFTP server without encountering a timeout problem.
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While setting up a PXE boot server on a CentOS 7 machine, I encountered a strange problem with TFTP.
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