|
TCP/UDP 端口
TCP 和 UDP 都是 IP 层的传输协议，是 IP 与上层之间的处理接口。TCP 和 UDP 协议端口号被设计来区分运行在单个设备上的多重应用程序的 IP 地址。
由于同一台机器上可能会运行多个网络应用程序，所以计算机需要确保目标计算机上接收源主机数据包的软件应用程序的正确性，以及响应能够被发送到源主机的正确应用程序上。该过程正是通过使用TCP 或 UDP 端口号来实现的。在 TCP 和 UDP 头部分，有“源端口”和“目标端口”段，主要用于显示发送和接收过程中的身份识别信息。IP 地址和端口号合在一起被称为“套接字”。
IETF IANA 定义了三种端口组：公认端口（Well Known Ports）、注册端口（RegisteredPorts）以及动态和/或私有端口（Dynamic and/or Private Ports） 。
- 公认端口（Well Known Ports）从0到1023。
- 注册端口（RegisteredPorts）从1024到49151。
- 动态和/或私有端口（Dynamic and/or Private Ports）从49152到65535。
 |
部分TCP/UDP端口 |
| 端口号 |
协议 |
服务名称 |
别名 |
注释 |
| 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 |
S-HTTP |
MCom |
|
| 443 |
UDP |
S-HTTP |
MCom |
|
| 445 |
TCP |
|
|
Microsoft CIFS |
| 445 |
UDP |
|
|
Microsoft CIFS |
| 464 |
TCP |
kpasswd |
|
Kerberos (v5) |
| 464 |
UDP |
kpasswd |
|
Kerberos (v5) |
| 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 |
|
|
| 636 |
TCP |
ldaps |
sldap |
LDAP over TLS/SSL |
| 749 |
TCP |
kerberos-adm |
|
Kerberos administration |
| 749 |
UDP |
kerberos-adm |
|
Kerberos administration |
|
