Ports Flashcards
port 20
FTP Data
data transfer between nodes
TCP
port 21
FTP Control
FTP commands
TCP
port 22
SSH, SFTP, SCP
encrypted Telnet
TCP
port 23
Telnet
run commands on remote device (plaintext)
TCP
port 25
SMTP
outgoing email
TCP
port 49
TACAS+ Cisco Proprietary
remotely authenticate into network device (AAA)
TCP
port 53
DNS
resolve FQDN to IP
TCP for zone transfers
UDP name queries
ports 67 & 68
DHCP
dynamically assigns IP addresses to nodes
UDP
port 69
TFTP
small file transfers. router and switch configs
UDP
port 80
HTTP
transfer web content
TCP
port 88
Kerberos
network authentication
TCP & UDP
port 110
POP3
retrieving email (take mail off server) TCP
port 123
NTS
network time protocol
UDP
port 135
MS RPC
remote procedure call
TCP & UDP
port 137
NetBios Name Service
TCP & UDP
port 138
NetBios Datagram Service
TCP & UDP
port 139
NetBios Session Service
TCP & UDP
port 143
IMAP
retrieve email (mail on server. setup rules reminders) TCP
ports 161 & 162
SNMP
monitor remote network devices (send/receive requests)
TRAPS
UDP
port 389
LDAP
directory services on your network
TCP & UDP
port 443
HTTPS
encrypted web content
TCP
port 500
IKE (ISAKMP)
IPSec key negotiation
UDP
port 514
syslog
log aggregation
TCP & UDP
port 587
STARTTLS
encrypted TLS: IMAP, POP3, SMTP
TCP
port 636
secure LDAP
LDAP over SSL
TCP
port 1433
Ms SQL
TCP
port 1701
L2F: l2tp
layer 2 forwarding
UDP
port 1723
pptp
microsoft tunneling protocol
UDP
port 1812
Radius
remote sign in
UDP
ports 2427 & 2727
media gateway control protocol
management data between call agent and call equipment (VOIP)
UDP
port 3389
Remote desktop
remote admin
TCP & UDP
ports 5004 & 5005
real time streaming protocol
timing control of VOIP traffic
UDP
ports 5060 & 5061
SIP
initialize VOIP call
UDP
