tcpmux 1/tcp # TCP port service multiplexer
tcpmux 1/udp # TCP port service multiplexer
rje 5/tcp # Remote Job Entry
rje 5/udp # Remote Job Entry
echo 7/tcp
echo 7/udp
discard 9/tcp sink null
discard 9/udp sink null
systat 11/tcp users
systat 11/udp users
daytime 13/tcp
daytime 13/udp
qotd 17/tcp quote
qotd 17/udp quote
msp 18/tcp # message send protocol
msp 18/udp # message send protocol
chargen 19/tcp ttytst source
chargen 19/udp ttytst source
ftp-data 20/tcp
ftp-data 20/udp
# 21 is registered to ftp, but also used by fsp
ftp 21/tcp
ftp 21/udp fsp fspd
ssh 22/tcp # SSH Remote Login Protocol
ssh 22/udp # SSH Remote Login Protocol
telnet 23/tcp
telnet 23/udp
# 24 - private mail system
lmtp 24/tcp # LMTP Mail Delivery
lmtp 24/udp # LMTP Mail Delivery
smtp 25/tcp mail
smtp 25/udp mail
time 37/tcp timserver
time 37/udp timserver
rlp 39/tcp resource # resource location
rlp 39/udp resource # resource location
nameserver 42/tcp name # IEN 116
nameserver 42/udp name # IEN 116
nicname 43/tcp whois
nicname 43/udp whois
tacacs 49/tcp # Login Host Protocol (TACACS)
tacacs 49/udp # Login Host Protocol (TACACS)
re-mail-ck 50/tcp # Remote Mail Checking Protocol
re-mail-ck 50/udp # Remote Mail Checking Protocol
domain 53/tcp # name-domain server
domain 53/udp
whois++ 63/tcp
whois++ 63/udp
bootps 67/tcp # BOOTP server
bootps 67/udp
bootpc 68/tcp # BOOTP client
bootpc 68/udp
tftp 69/tcp
tftp 69/udp
gopher 70/tcp # Internet Gopher
gopher 70/udp
netrjs-1 71/tcp # Remote Job Service
netrjs-1 71/udp # Remote Job Service
netrjs-2 72/tcp # Remote Job Service
netrjs-2 72/udp # Remote Job Service
netrjs-3 73/tcp # Remote Job Service
netrjs-3 73/udp # Remote Job Service
netrjs-4 74/tcp # Remote Job Service
netrjs-4 74/udp # Remote Job Service
finger 79/tcp
finger 79/udp
http 80/tcp www www-http # WorldWideWeb HTTP
http 80/udp www www-http # HyperText Transfer Protocol
kerberos 88/tcp kerberos5 krb5 # Kerberos v5
kerberos 88/udp kerberos5 krb5 # Kerberos v5
짧은글 일수록 신중하게.