ctf-writeups

Scan Me

Find hint at port 65534:

$ nc scanme.ctf.zone 65534
Use the order of ports for the order of the flag!

nc to some ports provides one-character, e.g. nc scanme.ctf.zone 18395 gives 0.

Get characters in parallel in fish shell:

for port in (seq 1024 65535)
    nc scanme.ctf.zone $port > nc-$port.txt &
end;
cat nc-*.txt

Solved!