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Protocols and Ports(TCP&UDP) for Servers
FTP
20, 21
SSH
22
HTTP
80
TELNET
23
SMTP
25
DNS
53
POP3
110
NTP
123
IMAP
143
SNMP
161
SSL
443
TFTP
69
BOOTPS/DHCP
67
IMAP with SSL/TLS
993
POP3 with SSL/TLS
995