Draytek VigorIPPBX 3510 User Manual page 136

Block ICMP Fragment Check the box to activate the Block ICMP fragment function. Any
Block Unknown
Protocol
Warning Messages
VigorIPPBX 3510 Series User's Guide
ICMP packets with more fragment bit set are dropped.
Check the box to activate the Block Unknown Protocol function.
Individual IP packet has a protocol field in the datagram header to
indicate the protocol type running over the upper layer. However,
the protocol types greater than 100 are reserved and undefined at
this time. Therefore, the router should have ability to detect and
reject this kind of packets.
We provide Syslog function for user to retrieve message from Vigor
router. The user, as a Syslog Server, shall receive the report sending
from Vigor router which is a Syslog Client.
All the warning messages related to DoS Defense will be sent to
user and user can review it through Syslog daemon. Look for the
keyword DoS in the message, followed by a name to indicate what
kind of attacks is detected.
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