Patton 3086, Руководство пользователя

Страница: 114 / 162

6 • Security Model 3086 G.SHDSL Integrated Access Device User Guide
114 Intrusion Detection System (IDS)
Intrusion Detection System (IDS)
The security feature in the 3086 IAD provides protection from a number of attacks. Some attacks cause a host
to be blacklisted (i.e., no traffic from that host is accepted under any circumstances) for a period of time. Other
attacks are simply logged. The subsequent table is a summary of the attacks detected.
1. To enable IDS, click on Enabled for “Intrusion Detection Enabled” on the “Security Interface Configura-
tion” page. Then click on
Change State(s)
.
2. Click on
Configure Intrusion Detection.
3. You may choose which of the parameters to configure and for which value.
– Use Blacklist:Default = 10 minutes when enabled.
If IDS has detected an intrusion an external host, access to the network is denied for ten minutes.
– Use Victim Protection:Default = Disabled.
Enables Victim Protection. Victim Protection protects the victim from an attempted spoofing attack.
Web spoofing allows an attacker to create a ‘shadow’ copy of the world wide web (WWW). All access to
the shadow Web goes through the attacker’s machine, so the attacker can monitor all of the victim’s
activities and send false data to or from the victim’s machine. When enabled, packets destined for the
victim host of a spooking style attack are blocked.
– DOS Attack Block Duration:Default = 1800 seconds (30 minutes).
A Denial of Service (DOS) attack is an attempt by an attacker to prevent legitimate users from using a
service. If a DOS attack is detected, all suspicious hosts are blocked by the firewall for a set time limit
– Scan Attack Block Duration:Default = 86400 seconds
Attack Name Protocol
Attacking Host
Blacklisted?
Ascend Kill UDP yes
Echo/Chargen UDP no
Echo Scan UDP yes
WinNuke TCP yes
Xmas Tree Scan TCP yes
IMAP SYN/FIN Scan TCP yes
Smurf ICMP If victim protection set
SYN/FIN/RST Flood TCP If scanning threshold
exceeded
Net Bus Scan TCP yes
Back Orifice Scan UDP yes