On 22.11.2017 21:24, Catalin Soare wrote: > udp 0 0 0.0.0.0:69 <http://0.0.0.0:69> > 0.0.0.0:* 1117/in.tftpd > :~$ nc -vz lab 69 > lab.home.org <http://lab.home.org> [192.168.1.179] 69 (?) : Connection > refused As you can see in the netstat output, tftpd is using UDP but your netcat tool tries to connect to 69/tcp. add -u to your nc args. best regards Ulf