ASA 5505 TFTP from one subnet to other creates empty file

[jonathanburg]

Hi everyone,

The Cisco ASA 5505 doesn't seem to allow the TFTP connection from 192.168.5.103/24 to 192.168.10.202/24. Normally TFTP is being used in the same subnet, but not in my case. I have a DHCP Relay which is working, but when I use the free TFTPD tool from one side to the other TFTPD tool, it only creates an empty file. Does someone know which config I might be missing in my Cisco ASA?

Thank you in advance.

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Nathan

[Poonam Garg · Accepted solution]

Hi Jonathan,

1. Please make sure tftp server is using the correct interface from the given subnet. (under Server Interfaces on tftpd32)

2. Check if the default gateway have a correct route towards TFTP Server.

3. Make sure TFTP server can reach the client subnet.

HTH