TFTP sending wrong IP address

[netbootxyz]

TFTP sending wrong IP address

[ikkemaniac]

I see this too, pretty logical as well as the docker container is only ware of its internal nic's if you're not in network_mode: host

That having said; no further/other configuration is need to get this up and running. As long as you fwd port 69/udp you can serve your LAN.

[dezeroku]

I've had similar experience when trying to run netbooxyz containerized without host networking.
The issue here seems to be that TFTP protocol, while accepting requests on port 69, can (should?) use (by the RFC) other ports to actually send the data.
This results in ReadReQuests to pass through to the container just ok, but NAT gets confused when container tries to open connections from other ports to the same host.

A fix for that is running TFTP server in a mode where only port 69 is used for both commands and data.
While this isn't strictly RFC compliant it should work with most clients.
PR adding such capability: #55
With this in place you'd have to set env variable TFTPD_OPTS='--tftp-single-port' and it should work.