Port Protocol Service Description
21 udp ftp ftp-file transfer [control] SANS Internet Storm Center activity for port 21
22 tcp/udp ssh SSH Remote Login Protocol SANS Internet Storm Center activity for port 22
22 udp pcanywherestat pcAnywhere Status - Default udp status port for v2.0 thru v7.51 - plus CE. Versions v8+ on use tcp 5631 & udp 5632. SANS Internet Storm Center activity for port 22
23 tcp/udp telnet Telnet - Standard for remote host admin. - Security Concerns of Telnet: - Cleartext - re-usable passwords - Portal for user account grinding CERT Advisories: CA-89.03 - CA-95.14 Replace with SSH on critical hosts. SANS Internet Storm Center activity for port 23
24 tcp/udp priv-mail priv-mail-any private mail system SANS Internet Storm Center activity for port 24
25 tcp smtp Simple Mail Transfer - Used by mail servers to receive inbound email. - Security Concerns: Email servers are complex engines - often run as root - and required open at most network perimeters. Thus are popular for attackers and new DOS or intrusion hacks always being found. Disable on non-mail server hosts. Open at perimeter only with static route to internal mail server. SANS Internet Storm Center activity for port 25
25 tcp/udp smtp smtp-simple mail transfer SANS Internet Storm Center activity for port 25
27 tcp/udp nsw-fe NSW User System FE SANS Internet Storm Center activity for port 27
29 tcp/udp msg-icp MSG ICP SANS Internet Storm Center activity for port 29
31 tcp/udp msg-auth MSG Authentication SANS Internet Storm Center activity for port 31
33 tcp/udp dsp Display Support Protocol SANS Internet Storm Center activity for port 33
35 tcp/udp printer-any Any Private Printer Server SANS Internet Storm Center activity for port 35
35 tcp/udp priv-print priv-print-any private printer server SANS Internet Storm Center activity for port 35
37 tcp/udp time Time - Provides remote timing stats of internal processing events. - Security Concerns: Gives remote attacker info on hosts internal processing load. Can identify critical processing times - plus output can be looped to echo port (7) and create a DOS threat to the subnet. Disable this port on all hosts. SANS Internet Storm Center activity for port 37
38 tcp/udp rap Route Access Protocol SANS Internet Storm Center activity for port 38

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Total Records 3780



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