TL;DR
Recon
we start with rustscat, using this command:
rustscan -a $target -- -sV -sC -oN nmap.txt -oX nmap.xml
we can see port 22 with ssh and port 80 with apache http server.
PORT STATE SERVICE REASON VERSION
22/tcp open ssh syn-ack ttl 63 OpenSSH 8.9p1 Ubuntu 3ubuntu0.13 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 256 1f:de:9d:84:bf:a1:64:be:1f:36:4f:ac:3c:52:15:92 (ECDSA)
| ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBN/Hhg1nYlWGdi109d6k/OXFg0xbLVuEho3xQqX/DkRDPQ5Y9P6l2XLkbsSscgiQIq3/bHeX6T4mLci0/I/kHeI=
| 256 70:a5:1a:53:df:d1:d0:73:3e:9d:90:ad:c1:aa:b4:19 (ED25519)
|_ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMYFumAaeF6fOwurP+3zFG7iyLB1XC40te7RWDNVze0x
80/tcp open http syn-ack ttl 63 Apache httpd 2.4.52
| http-methods:
|_ Supported Methods: GET HEAD POST OPTIONS
|_http-title: Did not follow redirect to http://gavel.htb/
|_http-server-header: Apache/2.4.52 (Ubuntu)
Service Info: Host: gavel.htb; OS: Linux; CPE: cpe:/o:linux:linux_kernel
Let’s add gavel.thb to our /etc/hosts.