I was scanning one of my friends servers using nmap and got these port details.
PORT STATE SERVICE
22/tcp open ssh
42/tcp filtered nameserver
80/tcp open http
111/tcp open rpcbind
135/tcp filtered msrpc
139/tcp filtered netbios-ssn
161/tcp filtered snmp
179/tcp filtered bgp
443/tcp open https
1028/tcp filtered unknown
1080/tcp filtered socks
3128/tcp filtered squid-http
6666/tcp filtered irc
6667/tcp filtered irc
6668/tcp filtered irc
7402/tcp open unknown
10082/tcp open amandaidx
And when I logged into the machine using SSh and scanned it again using nmap, I got the following result
PORT STATE SERVICE
22/tcp open ssh
25/tcp open smtp
80/tcp open http
111/tcp open rpcbind
443/tcp open https
631/tcp open ipp
7402/tcp open rtps-dd-mt
10082/tcp open amandaidx
Why question is why is it showing IRC ports and Squid Ports on the first scan? We don't have anything installed in it. Its a dedicated box and not running on VM. Is there any possibility that it might have been compromised? It doesn’t have any IPtables on it too.