Protocol Anomaly Configuration - ZyXEL Communications ZyWALL 1050 User Manual
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ZyWALL 1050 User's Guide
Table 114 HTTP Inspection and TCP/UDP/ICMP Decoders (continued)
LABEL
OVERSIZE-LEN ATTACK
TRUNCATED-HEADER
ATTACK
UNDERSIZE-LEN ATTACK
ICMP Decoder
TRUNCATED-ADDRESS-
HEADER ATTACK
TRUNCATED-HEADER
ATTACK
TRUNCATED-TIMESTAMP-
HEADER ATTACK
21.9.2 Protocol Anomaly Configuration
Select Policy > IDP > Profile > Protocol Anomaly. If you made changes to other screens
belonging to this profile, make sure you have clicked OK or Save to save the changes before
selecting the Protocol Anomaly tab.
356
DESCRIPTION
This is when a UDP packet is sent which has a UDP length field of
greater than the actual packet length. This may cause some
applications to crash.
This is when a UDP packet is sent which has a UDP datagram
length of less the UDP header length. This may cause some
applications to crash.
This is when a UDP packet is sent which has a UDP length field of
less than 8 bytes. This may cause some applications to crash.
This is when an ICMP packet is sent which has an ICMP datagram
length of less than the ICMP address header length. This may
cause some applications to crash.
This is when an ICMP packet is sent which has an ICMP datagram
length of less than the ICMP header length. This may cause some
applications to crash.
This is when an ICMP packet is sent which has an ICMP datagram
length of less than the ICMP Time Stamp header length. This may
cause some applications to crash.
Chapter 21 IDP
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