After having serious problems (DNS incident) I found out an IP address of a machine. Is it in any way possible to contact the owner without knowing anything else like email, domain name or website? I scanned it via nmap and found some services like:
21/tcp open ftp
22/tcp open ssh
53/tcp open domain
80/tcp open http
81/tcp open hosts2-ns
135/tcp filtered msrpc
139/tcp filtered netbios-ssn
445/tcp filtered microsoft-ds
3306/tcp open mysql
8081/tcp open blackice-icecap
I thought on leaving something in one of the log via a ssh connection test or one of the other services or something like that.
How can I leave a message that is seen on such a system?
Warm regards