Đây chỉ là danh sách những port thường gặp nhất, chưa phải là đầy đủ trong danh sách well-known port do IANA quy định.
| Số hiệu port |
Giao thức |
Tên dịch vụ |
Tên mã |
Giải thích |
| 7 |
TCP |
echo |
|
Echo |
| 7 |
UDP |
echo |
|
Echo |
| 9 |
TCP |
discard |
sink null |
Discard |
| 9 |
UDP |
discard |
sink null |
Discard |
| 13 |
TCP |
daytime |
|
Daytime |
| 13 |
UDP |
daytime |
|
Daytime |
| 17 |
TCP |
qotd |
quote |
Quote of the day |
| 17 |
UDP |
qotd |
quote |
Quote of the day |
| 19 |
TCP |
chargen |
ttytst source |
Character generator |
| 19 |
UDP |
chargen |
ttytst source |
Character generator |
| 20 |
TCP |
ftp-data |
|
File Transfer |
| 21 |
TCP |
ftp |
|
FTP Control |
| 23 |
TCP |
telnet |
|
Telnet |
| 25 |
TCP |
smtp |
mail |
Simple Mail Transfer |
| 37 |
TCP |
time |
|
Time |
| 37 |
UDP |
time |
|
Time |
| 39 |
UDP |
rlp |
resource |
Resource Location Protocol |
| 42 |
TCP |
nameserver |
name |
Host Name Server |
| 42 |
UDP |
nameserver |
name |
Host Name Server |
| 43 |
TCP |
nicname |
whois |
Who Is |
| 53 |
TCP |
domain |
|
Domain Name |
| 53 |
UDP |
domain |
|
Domain Name Server |
| 67 |
UDP |
bootps |
dhcps |
Bootstrap Protocol Server |
| 68 |
UDP |
bootpc |
dhcpc |
Bootstrap Protocol Client |
| 69 |
UDP |
tftp |
|
Trivial File Transfer |
| 70 |
TCP |
gopher |
|
Gopher |
| 79 |
TCP |
finger |
|
Finger |
| 80 |
TCP |
http |
www, http |
World Wide Web |
| 88 |
TCP |
kerberos |
krb5 |
Kerberos |
| 88 |
UDP |
kerberos |
krb5 |
Kerberos |
| 101 |
TCP |
hostname |
hostnames |
NIC Host Name Server |
| 102 |
TCP |
iso-tsap |
|
ISO-TSAP Class 0 |
| 107 |
TCP |
rtelnet |
|
Remote Telnet Service |
| 109 |
TCP |
pop2 |
postoffice |
Post Office Protocol – Version 2 |
| 110 |
TCP |
pop3 |
postoffice |
Post Office Protocol – Version 3 |
| 111 |
TCP |
sunrpc |
rpcbind portmap |
SUN Remote Procedure Call |
| 111 |
UDP |
sunrpc |
rpcbind portmap |
SUN Remote Procedure Call |
| 113 |
TCP |
auth |
ident tap |
Authentication Sevice |
| 117 |
TCP |
uucp-path |
|
UUCP Path Service |
| 119 |
TCP |
nntp |
usenet |
Network News Transfer Protocol |
| 123 |
UDP |
ntp |
|
Network Time Protocol |
| 135 |
TCP |
epmap |
loc-srv |
DCE endpoint resolution |
| 135 |
UDP |
epmap |
loc-srv |
DCE endpoint resolution |
| 137 |
TCP |
netbios-ns |
nbname |
NETBIOS Name Service |
| 137 |
UDP |
netbios-ns |
nbname |
NETBIOS Name Service |
| 138 |
UDP |
netbios-dgm |
nbdatagram |
NETBIOS Datagram Service |
| 139 |
TCP |
netbios-ssn |
nbsession |
NETBIOS Session Service |
| 143 |
TCP |
imap |
imap4 |
Internet Message Access Protocol |
| 158 |
TCP |
pcmail-srv |
repository |
PC Mail Server |
| 161 |
UDP |
snmp |
snmp |
SNMP |
| 162 |
UDP |
snmptrap |
snmp-trap |
SNMP TRAP |
| 170 |
TCP |
print-srv |
|
Network PostScript |
| 179 |
TCP |
bgp |
|
Border Gateway Protocol |
| 194 |
TCP |
irc |
|
Internet Relay Chat Protocol |
| 213 |
UDP |
ipx |
|
IPX over IP |
| 389 |
TCP |
ldap |
|
Lightweight Directory Access Protocol |
| 443 |
TCP |
https |
MCom |
|
| 443 |
UDP |
https |
MCom |
|
| 445 |
TCP |
|
|
Microsoft CIFS |
| 445 |
UDP |
|
|
Microsoft CIFS |
| 464 |
TCP |
kpasswd |
|
Kerberos (v5) |
| 464 |
UDP |
Smtp (SSL) |
|
Simple Mail Transfer with SSL |
| 500 |
UDP |
isakmp |
ike |
Internet Key Exchange (IPSec) |
| 512 |
TCP |
exec |
|
Remote Process Execution |
| 512 |
UDP |
biff |
comsat |
Notifies users of new mail |
| 513 |
TCP |
login |
|
Remote Login |
| 513 |
UDP |
who |
whod |
Database of who’s logged on, average load |
| 514 |
TCP |
cmd |
shell |
Automatic Authentication |
| 514 |
UDP |
syslog |
|
|
| 515 |
TCP |
printer |
spooler |
Listens for incoming connections |
| 517 |
UDP |
talk |
|
Establishes TCP Connection |
| 518 |
UDP |
ntalk |
|
|
| 520 |
TCP |
efs |
|
Extended File Name Server |
| 520 |
UDP |
router |
router routed |
RIPv.1, RIPv.2 |
| 525 |
UDP |
timed |
timeserver |
Timeserver |
| 526 |
TCP |
tempo |
newdate |
Newdate |
| 530 |
TCP,UDP |
courier |
rpc |
RPC |
| 531 |
TCP |
conference |
chat |
IRC Chat |
| 532 |
TCP |
netnews |
readnews |
Readnews |
| 533 |
UDP |
netwall |
|
For emergency broadcasts |
| 540 |
TCP |
uucp |
uucpd |
Uucpd |
| 543 |
TCP |
klogin |
|
Kerberos login |
| 544 |
TCP |
kshell |
krcmd |
Kerberos remote shell |
| 550 |
UDP |
new-rwho |
new-who |
New-who |
| 556 |
TCP |
remotefs |
rfs rfs_server |
Rfs Server |
| 560 |
UDP |
rmonitor |
rmonitord |
Rmonitor |
| 561 |
UDP |
monitor |
|
|
| 587 |
Smtp (TLS) |
|
|
Simple Mail Transfer with TLS |
| 636 |
TCP |
ldaps |
sldap |
LDAP over TLS/SSL |
| 749 |
TCP |
kerberos-adm |
|
Kerberos administration |
| 749 |
UDP |
kerberos-adm |
|
Kerberos administration |
| 993 |
IMAP (secure) |
|
|
Internet Message Access Protocol |
| 995 |
POP3 (secure) |
|
|
Post Office Protocol Secure |