TCP/IP vulnerabilities and various TCP and UDP port numbers

Overlapping IP fragments

This exploit alter the code from the teardrop attack to include the use of a SYN sequence bug. The attack will launch two IP fragments, through the offset of the second piece inside the prior packet's consignment that overlaps but does not include sufficient payloads to complete the datagram

Teardrop Attack

IP needs a packet that is too big for the next router to handle be separated into fragments. The attacker's IP puts a puzzling offset value in the second or afterward fragment.

If the getting operating system is not able to combine the packets consequently, it can collapse the system.

The Unnamed Attack

Deviation of Teardrop attack. Fragments are not overlapping; as an alternative there are gaps included. Watchfully plan of the algorithm for generating these early sequence numbers ensures that overlie in sequence number gap between different incarnations of a link is prevented

SYN Attack

The attacker sends fake TCP SYN requests to a wounded server. The host allocates memory sockets for the connection. It avoids the server from responding to lawful requests. This assault exploits the three-way handshake. Malicious flooding by huge volumes of TCP SYN packets to the injured party system with spoofed source IP addresses can reason DoS.

Port Number Protocol

21 TCP FTP (File Transfer Protocol)

22 TCP/UDP SSH (ssh,scp copy or sftp)

23 TCP/UDP Telnet

25 TCP/UDP SMTP (for sending outgoing emails)

43 TCP WHOIS function

53 TCP/UDP DNS Server (Domain name service for DNS requests)

70 TCP Gopher Protocol

79 TCP Finger protocol

110 TCP POP3 (for receiving email)

119 TCP NNTP (Network News Transfer Protocol)

143 TCP/UDP IMAP4 Protocol (for email service)

194 TCP IRC

389 TCP/UDP LDAP (light weight directory access)

443 TCP Secure HTTP over SSL (https)

465 TCP Secure SMTP (email) using SSL

990 TCP/UDP Secure FTP using SSL

993 TCP Secure IMAP protocol over SSL (for emails)

1433 TCP/UDP Microsoft SQL server port

2082 TCP Cpanel default port

2083 TCP Cpanel over SSL

2086 TCP Cpanel Webhost Manager (default)

2087 TCP Cpanel Webhost Manager (with https)

2095 TCP Cpanel Webmail

2096 TCP Cpanel secure webmail over SSL

2222 TCP DirectAdmin Server Control Panel