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Chapter 30 ADP
ZyWALL USG 300 User’s Guide
459
30.9.2 Protocol Anomaly Configuration
In the Anti-X > ADP > Profile screen, click the Edit icon or the Add icon and choose a base
profile, then select the Protocol Anomaly tab. 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.
UDP Decoder
OVERSIZE-LEN ATTACK 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.
TRUNCATED-HEADER
ATTACK
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.
UNDERSIZE-LEN ATTACK 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.
ICMP Decoder
TRUNCATED-ADDRESS-
HEADER ATTACK
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.
TRUNCATED-HEADER
ATTACK
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.
TRUNCATED-TIMESTAMP-
HEADER ATTACK
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.
Table 144 HTTP Inspection and TCP/UDP/ICMP Decoders (continued)
LABEL DESCRIPTION