Port Numbers

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 25 SMTP
 53 DNS
 80 HTTP
 88 Kerberos
 102 X.400
 110 POP3
 3389 RDP 
 119 NNTP
 135 RPC
 137 – NetBIOS Session Service
 139 – NetBIOS Name Service
 143 IMAP4
 379 LDAP (SRS)
 389 LDAP
 21  ftp
 443 HTTP (SSL)
 445 – NetBIOS over TCP
 465 SMTP (SSL)
 563 NNTP (SSL)
 636 LDAP (SSL)
 691 LSA
 993 IMAP4 (SSL)
 994 IRC (SSL)
 995 POP3 (SSL)
 1503 T.120
 1720 H.323
 1731 Audio conferencing
 1863 – MSN IM
 3268 GC
 3269 GC (SSL)
 6001 Rpc/HTTP Exchange Store
 6002 HTTP Exchange Directory Referral service
 6004 Rpc/HTTP NSPI Exchange Directory Proxy service/Global Catalog
 6667 IRC/IRCX
 6891 – 6900 – MSN IM File transfer
 6901 – MSN IM Voice
 7801 – 7825 – MSN IM Voice

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