Draytek 2130 - Manual (Page 136)

Vigor2130 Series User’s Guide 128
ICMP Code Filter Specify the ICMP code filter for this ACE.
Any: No ICMP code filter is specified (ICMP code filter
status is "don't-care").
Specific: If you want to filter a specific ICMP code filter
with this ACE, you can enter a specific ICMP code value.
A field for entering an ICMP code value appears.
ICMP Code Value If you choose Specific as ICMP Code Filter, you have to
type the ICMP Type Value manually. The allowed range is
0 to 255. A frame meeting this ACE matches this ICMP
value.
z Choose IPv4 as the Frame Type. You will see IP Parameters on the bottom of the page.
If you choose UDP as IP Protocol Filter, you will get the page as the following:
IP TTL Specify the Time-to-Live settings for this ACE.
Zero: IPv4 frames with a Time-to-Live field greater than
zero must not be able to match this entry.
Non-zero: IPv4 frames with a Time-to-Live field greater
than zero must be able to match this entry.
Any: Any value is allowed.
IP Fragment Specify the fragment offset settings for this ACE. This
involves the settings for the More Fragments (MF) bit and
the Fragment Offset (FRAG OFFSET) field for an IPv4
frame.
No: IPv4 frames where the MF bit is set or the FRAG
OFFSET field is greater than zero must not be able to
match this entry.