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Port 3128 Details


known port assignments and vulnerabilities
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Port(s) Protocol Service Details Source
3128 tcp ndl-aas Port used by some proxy servers. Common web proxy server ports: 8080, 80, 3128, 6588

Officiall assignment: Active API Server Port

Trojans and backdoors that use this port: Masters Paradise, Reverse WWW Tunnel Backdoor, RingZero

Mydoom.B (01.28.2004) - mass-mailing worm that opens a backdoor into the system. The backdoor makes use of TCP ports 80, 1080, 3128, 8080, and 10080.

W32.HLLW.Deadhat (2004.02.06) - a worm with backdoor capabilities. It attempts to uninstall the W32.Mydoom.A@mm and W32.Mydoom.B@mm worms, and then it spreads to other systems infected with Mydoom. Also, it spreads through the Soulseek file-sharing program.

Multiple buffer overflows in Thomas Hauck Jana Server allow remote attackers to cause a denial of service and possibly execute arbitrary code via an HTTP GET request with a long major version number, an HTTP GET request to the HTTP proxy on port 3128 with a long major version number, a long OK reply from a POP3 server, and a long SMTP server response.
References: [CVE-2002-1061], [BID-5320]
SG
3128 tcp HTTP used by Web caches and the default for the Squid cache (unofficial) Wikipedia
3128 tcp trojan Reverse WWW Tunnel Backdoor , RingZero Trojans
3128 tcp,udp ndl-aas Active API Server Port IANA
3128 tcp squid-http Proxy Server SANS
3128 tcp squid-http squid-http Nmap
3128 tcp ReverseWWWTunnel [trojan] Reverse WWW Tunnel Backdoor Neophasis
3128 tcp RingZero [trojan] RingZero Neophasis
3128 tcp threat Mydoom Bekkoame
3128 tcp threat Reverse WWW Tunnel Backdoor Bekkoame
3128 tcp threat RingZero Bekkoame
3128 tcp threat W32.HLLW.Deadhat Bekkoame
3128 tcp,udp threat Squid Bekkoame
3074-3174 udp applications Rainbow Six Vegas Portforward
14 records found
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Related ports: 1080  2766  3127  

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External Resources
SANS Internet Storm Center: port 3128

Notes:
Well Known Ports: 0 through 1023.
Registered Ports: 1024 through 49151.
Dynamic/Private : 49152 through 65535.

TCP ports use the Transmission Control Protocol. TCP is the most commonly used protocol on the Internet and any TCP/IP network. Whereas the IP protocol deals only with packets, TCP enables two hosts to establish a connection and exchange streams of data. TCP guarantees delivery of data and that packets will be delivered in the same order in which they were sent. Guaranteed communication/delivery is the key difference between TCP and UDP.

UDP ports use the Datagram Protocol, a communications protocol for the Internet network, transport, and session layers. Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) and makes possible the transmission of datagrams from one computer to applications on another computer, but unlike TCP, UDP is connectionless and does not guarantee reliable communication; it's up to the application that received the message to process any errors and verify correct delivery. UDP is often used with time-sensitive applications, such as audio/video streaming, where dropping some packets is preferable to waiting for delayed data.

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