| 20 |
FTP |
TCP |
(Data) Large active File Transfers |
| 21 |
FTP |
TCP |
(Control)Used for sending commands(login, files) |
| 22 |
SSH |
TCP |
Secure remote access |
| 25 |
SMTP |
TCP |
Mail Transfer, Sending Only |
| 53 |
DNS |
TCP/UDP |
Resolves Domain Names/IP |
| 67 |
DHCP |
UDP |
Assigns IP’s to network hosts |
| 68 |
DHCP |
UDP |
(Server)Sends DHCP config to reciever |
| 69 |
TFTP |
UDP |
(Client) Recieves config from server |
| 80 |
HTTP |
TCP |
Unencrytped web traffic |
| 110 |
POP3 |
TCP |
Fetches email to host & removes them from server |
| 123 |
NTP |
UDP |
Syncs system clock across network |
| 135 |
RCP |
TCP/UDP |
Remote Procedural Call(Windows remote) |
| 143 |
IMAP |
TCP |
Retrieves Emails without deleting(multidevice) |
| 161 |
SNMP |
UDP |
Polls devices for metrics |
| 162 |
SNMP |
UDP |
Device alerts |
| 389 |
LDAP |
TCP/UDP |
Directory access |
| 443 |
HTTPS |
TCP |
Secure web traffic |
| 445 |
SMB |
TCP |
LAN file transfer(Samba on Linux) |
| 3389 |
RDP |
TCP |
Remote Desktop |