Although some port scanners are able to identify storage systems as storage systems, others port scanners report storage systems as unknown types, UNIX systems because of their NFS support, or Windows systems because of their CIFS support. There are several services that are not currently listed in the /etc/services file.
Following is an example of a complete list of the file contents.
| Service | Port/ Protocol | Description |
|---|---|---|
| ftp-data | 20/tcp | # File transfer protocol |
| ftp | 21/tcp | # File transfer protocol |
| ssh | 22/tcp | # SecureAdmin rsh replacement |
| telnet | 23/tcp | # Remote login (insecure) |
| smtp | 25/tcp | # outbound connections for autosupport |
| time | 37/tcp | # Time Service |
| time | 37/udp | # Time Service |
| domain | 53/udp | # DNS - outbound only |
| domain | 53/tcp | # DNS zone transfers - unused |
| dhcps | 67/udp | # DHCP server - outbound only |
| dhcp | 68/udp | # DHCP client - only first-time setup |
| tftp | 69/udp | # Trivial FTP - for netboot support |
| http | 80/tcp | # HTTP license, FilerView, SecureAdmin |
| kerberos | 88/udp | # Kerberos 5 - outbound only |
| kerberos | 88/tcp | # Kerberos 5 - outbound only |
| portmap | 111/udp | # aka rpcbind, used for NFS |
| portmap | 111/tcp | # aka rpcbind, used for NFS |
| nntp | 119/tcp | # unused, shouldn't be listed here. |
| ntp | 123/tcp | # Network Time Protocol |
| ntp | 123/udp | # Network Time Protocol |
| netbios-name | 137/udp | # NetBIOS nameserver - for CIFS |
| netbios-dg | 138/udp | # NetBIOS datagram service - for CIFS |
| ftp-data | 139/tcp | # NetBIOS service session - for CIFS |
| ssl | 443/tcp | # Secure FilerView (SecureAdmin) |
| cifs-tcp | 445/tcp | # CIFS over TCP with NetBIOS framing |
| snmp | 161/udp | # For Data Fabric Manager or other such tools |
| shell | 514/tcp | # rsh, insecure remote command execution. |
| syslog | 514/udp | # outbound only |
| route | 520/udp | # for RIP routing protocol |
| kerberos-sec | 750/udp | # outbound only, if at all |
| kerberos-sec | 750/tcp | # outbound only, if at all |
| nfsd | 2049/udp | # primary NFS service |
| nfsd | 2049/tcp | # primary NFS service |
| ttcp | 5001/udp | # unused, shouldn't be listed here. |
| ttcp | 5001/tcp | # unused, shouldn't be listed here. |
| ndmp | 10000/tcp | # for network backups |
| snapmirro | 10566/tcp | # also SnapVault |
| ndmp-local | 32243/tcp | # Internal connection inside your storage system |