Service Restrictions

The following IANA registered protocols are supported through the Johns Hopkins University and Medical Institutions perimeter firewalls. Other services may work, but are not supported and may be discontinued at any time.

• FTP - Passive & Active
• ssh
• http - on standard ports
• pop3
• nntp (usenet)
• ntp
• imap4
• Netmeeting
• Timbuktu
• https
• klogin
• kshell
• Appleshare IP
• Quicktime/RTSP
• Filemaker Pro
• SQLNet
• Groupwise
• h323
• eklogin
• CVS
• PCAnywhere
• Netscape Enterprise Calendaring
• Quicktime/RTP
• RealMedia

 The following ports and protocols are allowed on our wireless networks.

 standard wireless network

• Intranet
  • TCP
    • www
    • https
    • ssh
    • 122
    • imap4 over TLS/SSL
    • pop3 over TLS/SSL
    • 1677
    • 1678
    • 1679
    • 3389
    • 5150
  • UDP
    • ntp
• Internet
  • TCP
    • www
    • https
    • ftp-data
    • ftp
    • pop3
    • imap4
    • ssh
    • 122
    • aol
    • 993
    • 995
  • UDP
    • ntp

enhanced wireless network

• Intranet
• • All TCP and UDP ports
• Internet
• • TCP
  • • www
    • https
    • ftp-data
    • ftp
    • pop3
    • imap4
    • ssh
    • 122
    • aol
    • imap4 over TLS/SSL
    • pop3 over TLS/SSL

The following ports and protocols are allowed via JHSecure remote access.

• Intranet
  • All TCP and UDP ports
• Internet
• • TCP
  • • www
    • https
    • ftp-data
    • ftp
    • smtp
    • pop3
    • imap4
    • ssh
    • 210
    • 465
    • 591
    • imap4 over TLS/SSL
    • pop3 over TLS/SSL
    • 1863
    • 5050
    • 5222
    • 8991
    • 20443

Questions about service restrictions should be sent to issues@jhu.edu