A very important field in the packet format of the network layer---packet is called the protocol number. For example, if the transport layer is a TCP connection, then the protocol number in the network layer IP packet will have a value of 6, if it is UDP, then that value is the --- transport layer.
the Transport layer --- ---The application layer through the Interface Association (the field of the port is called the port ) . use Netstat–an to view the port numbers that are open to the machine.
the following ports are commonly used by proxy servers:(1).
HTTP protocol Proxy Server Common port number:80/8080/3128/8081/9080 (2).
SOCKS Proxy Protocol Server common port number: (3). FTP(File Transfer) protocol Proxy Server Common port number: (4). Telnet(remote login) protocol proxy Server Common port :
HTTPserver, the default port number is 80/tcp(Trojan Executor Open this port);
HTTPS(securely transferring Web pages) server, the default port number is 443/tcp 443/udp;
Telnet(unsecured text transfer), the default port number is 23/tcp(Trojan Tiny Telnet Server open port);
FTP, the default port number is 21/tcp(Trojan Doly Trojan,Fore,Invisible FTP,WebEx,Wincrash and Blade Runner Open ports);
TFTP(Trivial File Transfer Protocol ), the default port number is 69/udp;
SSH(Secure login),
SCP(file transfer), port redirection, the default port number is 22/tcp;
SMTP simple Mail Transfer Protocol (e-mail) 25/tcpantigen email Password Sender haebu Coceda shtrilitz Stealth winpcwinspy POP3 Post Office Protocol (e-mail) , the default port number is 110/tcp;
WebLogic, the default port number is 7001;
Webshpereapplication, the default port number is 9080;
Webshperemanagement tool, the default port number is 9090;
JBOSS, the default port number is 8080;
TOMCAT, the default port number is 8080;
WIN2003
Remote Login, the default port number is 3389;
Symantec av/filter for MSE, the default port number is 8081;
Oracle
Database, the default port number is 1521;
ORACLE Emctl, the default port number is 1158;
Oracle XDB( XML database), the default port number is 8080;
Oracle XDB FTPservice, the default port number is 2100;
MS Sql*server
Database
Server, the default port number is 1433/tcp 1433/udp;
MS Sql*server
Database
Monitor, the default port number is 1434/tcp 1434/udp;
QQ, the default port number is 1080/udp
Common default port numbers