Default Port Numbers
ftp-data        20
ftp             21
ftps            990
telnet          23
telnets         992
smtp            25
smtp-data       25
smtps           465
whois           43
domain          53
dns             53
gopher          70
finger          79
http            80
httpft          80
https           443
ssltunnel       443
pop             110
pop3s           995
imap            143
imaps           993
ident           113
nntp            119
nntps           563
news            119
nbt             139
prospero        191
archie          191
wais            210
tsp             318
ldap            389
ldaps           636
lpr             515
X               6000
syslog          514
talk            517
socks           1080
socks4          1080
socks5          1080
icap            1344
cuseeme         7648
icp             3130
sftp            22