updating their website is a good guess...
the server is up but for some reason they close the port for the website..
[root@centos21 ~]# ping www.shamaranpetroleum.com
PING www.shamaranpetroleum.com (18.104.22.168) 56(84) bytes of data.
64 bytes from 22.214.171.124: icmp_seq=1 ttl=57 time=11.4 ms
64 bytes from 126.96.36.199: icmp_seq=2 ttl=57 time=10.8 ms
[root@centos21 ~]# telnet www.shamaranpetroleum.com 80
telnet: connect to address 188.8.131.52: Connection refused