Configuring Device Security
Defining DoS Prevention
ESW 500 Series Switches Administration Guide 172
5
• Back Orifice Trojan — Discards UDP packets with destination UDP port equal
to 31337 and source UDP port equal to 1024.
STEP 2 Define the relevant fields.
STEP 3 Click Apply. The DoS prevention global settings are defined, and the device is
updated.
Defining Martian Addresses
Martian Address Filtering enables discarding IP packets from invalid IP addresses.
Martian addresses include packets from a source IP addresses outside or not
used within the configured network. Martian addresses include any address within
the following ranges:
• 0.0.0.0/8 (Except 0.0.0.0/32 as a Source Address) — Addresses in this
block refer to source hosts on this network.
• 127.0.0.0/8 — Used as the Internet host loopback address.
• 192.0.2.0/24 — Used as the TEST-NET in documentation and example codes.
• 224.0.0.0/4 (As a Source IP Address) — Used in Multicast address
assignments, and This formerly known as Class D Address Space.
• 240.0.0.0/4 (Except 255.255.255.255/32 as a Destination Address) —
Reserved address range, and is formerly known as Class E Address Space.
To define Martian Addresses:
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