8.4 One of the non-payload options in Snort is flow. This option distinguishes between clients and servers. This option can be used to specify a match only for packets flowing in one direction (client to server or vice-versa) and can specify a match only on established TCP connections. Consider the following Snort rule: alert tcp $EXTERNAL_NET any -> $SQL_SERVERS $ORACLE_PORTS\ (msg: “ORACLE drop table attempt:;\ flow: to_server, established; content: “drop table_name”; nocase;\ classtype: protocol-command-decode;) a. What does this rule do? b. Comment on the significance of this rule if the Snort devices is placed inside or outside of the external firewall.
8.4 One of the non-payload options in Snort is flow. This option distinguishes between clients and servers. This option can be used to specify a match only for packets flowing in one direction (client to server or vice-versa) and can specify a match only on established TCP connections. Consider the following Snort rule: alert tcp $EXTERNAL_NET any -> $SQL_SERVERS $ORACLE_PORTS\ (msg: “ORACLE drop table attempt:;\ flow: to_server, established; content: “drop table_name”; nocase;\ classtype: protocol-command-decode;) a. What does this rule do? b. Comment on the significance of this rule if the Snort devices is placed inside or outside of the external firewall.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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8.4 One of the non-payload options in Snort is flow. This option distinguishes between clients
and servers. This option can be used to specify a match only for packets flowing in one direction
(client to server or vice-versa) and can specify a match only on established TCP connections.
Consider the following Snort rule:
alert tcp $EXTERNAL_NET any -> $SQL_SERVERS $ORACLE_PORTS\ (msg: “ORACLE drop table
attempt:;\ flow: to_server, established; content: “drop table_name”; nocase;\
classtype: protocol-command-decode;)
a. What does this rule do?
b. Comment on the significance of this rule if the Snort devices is placed inside or outside of the
external firewall.
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