Port Binding

Binding a port below 1024 requires root. Run dxflow with sudo, move it to an unprivileged port, or grant it the permission it needs — the per-platform options are below.

Default ports

The engine only opens a port when a boot flag asks for one:

Both are configurable per profile, which is the simplest way out of the problem entirely:

dxflow config set http-port 8080
dxflow config set https-port 8443

Keeping the privileged port

Linux

Run with sudo, or grant the bind capability once so the binary can use privileged ports as a normal user:

sudo dxflow boot up --console                                # simplest

sudo setcap 'cap_net_bind_service=+ep' /usr/local/bin/dxflow  # recommended
dxflow boot up --console                                     # then no sudo

macOS

setcap has no macOS equivalent. Run with sudo, or serve on an unprivileged port and forward the privileged one to it:

sudo dxflow boot up --console                # simplest

# Or: serve on 8080 and forward 80 to it
dxflow config set http-port 8080
echo "rdr pass inet proto tcp from any to any port 80 -> 127.0.0.1 port 8080" | sudo pfctl -ef -

The pfctl rule is not persistent — it is lost on reboot unless you add it to /etc/pf.conf.

Windows

Run the terminal as Administrator, or add URL ACLs so any user can bind the ports:

# As Administrator, once:
netsh http add urlacl url=http://+:80/ user=Everyone
netsh http add urlacl url=https://+:443/ user=Everyone

Then dxflow boot up --console works from an ordinary terminal.