ZyXEL Communications P-334WT Support Notes page 125

The detailed format of the Ethernet Version II:
+ Ethernet Version II
- Address:
(Destination MAC)
- Ethernet II Protocol Type: IP
+ Internet Protocol
- Version (MSB 4 bits): 4
- Header length (LSB 4 bits): 5
- Service type: Precd=Routine, Delay=Normal, Thrput=Normal,
Reli=Normal
- Total length: 60 (Octets)
- Fragment ID: 60172
- Flags: May be fragmented, Last fragment, Offset=0 (0x00)
- Time to live: 32 seconds/hops
- IP protocol type: ICMP (0x01)
- Checksum: 0xE3EA
- IP address 202.132.155.93
202.132.155.99(Destination IP address)
- No option
+ Internet Control Message Protocol
- Type: 8 - Echo Request
- Code: 0
- Checksum: 0x455C
- Identifier: 768
- Sequence Number: 1280
- Optional Data: (32 bytes)
Configurations
From the above first trace, we know a client is trying to ping request the P-334WT router. And from the
second trace, we know the P-334WT router will send a reply to the client accordingly. The following
sample filter will utilize the 'Generic Filter Rule' to block the MAC address
1. First, from the incoming LAN packet we know the uninteresting source MAC address starts at the 7th
Octet
00-80-C8-4C-EA-63 (Source MAC) ----> 00-A0-C5-23-45
(Source IP address) ---->
[00 80 c8 4c ea 63].