Linksys SRW224P Cisco SRW224P 24-Port 10/100 + 2-Port Gigabit Switch with WebV - Page 66

Protocol, Source/Destination Port 0-65535, Control Code 0-63, Control Code Bitmask 0-63 - reset default

Get Linksys SRW224P - 10/100 - Gigabit Switch PDF manuals and user guides
UPC - 745883566068
View all Linksys SRW224P manuals
Add to My Manuals
Save this manual to your list of manuals

Page 66 highlights

24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet Protocol. Specifies the protocol type to match as TCP, UDP or Others, where others indicates a specific protocol number (0-255). (Options: TCP, UDP, Others; Default: TCP) Source/Destination Port (0-65535). Source/destination port number for the specified protocol type. (Range: 065535) Control Code (0-63). Decimal number (representing a bit string) that specifies flag bits in byte 14 of the TCP header. (Range: 0-63) Control Code Bitmask (0-63). Decimal number representing the code bits to match. The control bitmask is a decimal number (for an equivalent binary bit mask) that is applied to the control code. Enter a decimal number, where the equivalent binary bit "1" means to match a bit and "0" means to ignore a bit. The following bits may be specified: • 1 (fin) - Finish • 2 (syn) - Synchronize • 4 (rst) - Reset • 8 (psh) - Push • 16 (ack) - Acknowledgement • 32 (urg) - Urgent pointer For example, use the code value and mask below to catch packets with the following flags set: • - SYN flag valid, use control-code 2, control bitmask 2 • - Both SYN and ACK valid, use control-code 18, control bitmask 18 • - SYN valid and ACK invalid, use control-code 2, control bitmask 18 58 Chapter 5: Configuring the Switch through the Web Utility Security

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
58
Chapter 5: Configuring the Switch through the Web Utility
Security
24-Port 10/100 + 2-Port Gigabit Switch with Webview and Power over Ethernet
Protocol
. Specifies the protocol type to match as TCP, UDP or Others, where others indicates a specific protocol
number (0-255). (Options: TCP, UDP, Others; Default: TCP)
Source/Destination Port (0-65535)
. Source/destination port number for the specified protocol type. (Range: 0-
65535)
Control Code (0-63)
. Decimal number (representing a bit string) that specifies flag bits in byte 14 of the TCP
header. (Range: 0-63)
Control Code Bitmask (0-63)
. Decimal number representing the code bits to match. The control bitmask is a
decimal number (for an equivalent binary bit mask) that is applied to the control code. Enter a decimal number,
where the equivalent binary bit “1” means to match a bit and “0” means to ignore a bit. The following bits may be
specified:
•
1 (fin) – Finish
•
2 (syn) – Synchronize
•
4 (rst) – Reset
•
8 (psh) – Push
•
16 (ack) – Acknowledgement
•
32 (urg) – Urgent pointer
For example, use the code value and mask below to catch packets with the following flags set:
•
- SYN flag valid, use control-code 2, control bitmask 2
•
- Both SYN and ACK valid, use control-code 18, control bitmask 18
•
- SYN valid and ACK invalid, use control-code 2, control bitmask 18