'''1.''' Check if TCP is functional.

* without DNS:
** The following command uses an IP address <code>{{check.torproject.org_IP}}</code>.
** {{CodeSelect|code=
UWT_DEV_PASSTHROUGH=1 curl --tlsv1.3 --proto =https -H 'Host: check.torproject.org' -k https://{{check.torproject.org_IP}}/api/ip
}}

'''2.''' Check if DNS + TCP is functional.

* with DNS:
** The following command uses a hostname <code>check.torproject.org</code>.
** {{CodeSelect|code=
UWT_DEV_PASSTHROUGH=1 curl --tlsv1.3 --proto =https https://check.torproject.org/api/ip
}}