Common Ports and Protocols

Port numbers

TCP

• FTP 21
• SSH 22
• Telnet 23
• SMTP 25
• DNS 53
• HTTP 80 HTTPS 443
• POP3 110
• NETBIOS windows 139
• SMB 139 + 445 (fileshares)
• wannacry, SMB, 445
  • SAMBA, v important in kali
• IMAP 143

UDP

• DNS 53
• DHCP 67,68
• TFTP 69 (trivial ftp)
• SNMP 161 (simple network management protocol)

IP addresses

ifconfig inet is the ip 32 bits = 4 bytes

• 210.48.222.13 18 july
• inet 192.168.244.128
• privates? 10 ALL
• 172.16 -172.31.255.255
• 192 168 - 192.168.255.255

Table:

• A 0-127
• B 128-191
• C 192-223
• D 224-239
• E 240-255

Media Access Control

ether 00:0c:29 :eb:29:ab first 3 is identifiers ie this vmware

Transmission Control Protocol

TCP VS UDP USER DATAGRAM PROTOCOL SYN > SYN ACK > ACK port http:80 443:https