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By examining the packet identify the name and version of the Web server?

This packet was taken from a packet sniffer that monitors a Web server.

This packet was originally 1514 bytes long, but only the first 512 bytes are shown here. This is the
standard hexdump representation of a network packet, before being decoded. A hexdump has
three columns: the offset of each line, the hexadecimal data, and the ASCII equivalent. This
packet contains a 14-byte Ethernet header, a 20-byte IP header, a 20-byte TCP header, an HTTP
header ending in two line-feeds (0D 0A 0D 0A) and then the data. By examining the packet
identify the name and version of the Web server?

What type of social engineering attack has Neil employed here?

Neil is an IT security consultant working on contract for Davidson Avionics. Neil has been hired to
audit the network of Davidson Avionics. He has been given permission to perform any tests
necessary. Neil has created a fake company ID badge and uniform. Neil waits by one of the
company’s entrance doors and follows an employee into the office after they use their valid access
card to gain entrance. What type of social engineering attack has Neil employed here?

What attacks can you successfully launch against a server using the above technique?

After a client sends a connection request (SYN) packet to the server, the server will respond
(SYN-ACK) with a sequence number of its choosing, which then must be acknowledged (ACK) by
the client. This sequence number is predictable; the attack connects to a service first with its own
IP address, records the sequence number chosen, and then opens a second connection from a
forged IP address. The attack doesn’t see the SYN-ACK (or any other packet) from the server,
but can guess the correct responses. If the source IP address is used for authentication, then the
attacker can use the one-sided communication to break into the server. What attacks can you
successfully launch against a server using the above technique?


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