Administrator Guide
seq sequence-number {deny | permit} tcp {source mask | any | host ip-address} [count [byte]]
[order] [monitor [session-id]] [fragments]
Congure Filters, UDP Packets
To create a lter for UDP packets with a specied sequence number, use the following commands.
1 Create an extended IP ACL and assign it a unique name.
CONFIGURATION mode
ip access-list extended access-list-name
2 Congure an extended IP ACL lter for UDP packets.
CONFIG-EXT-NACL mode
seq sequence-number {deny | permit} tcp {source mask | any | host ip-address} [count [byte]]
[order] [monitor [session-id]] [fragments]
Example of the seq Command
When you create the lters with a specic sequence number, you can create the lters in any order and the lters are placed in the correct
order.
NOTE: When assigning sequence numbers to lters, you may have to insert a new lter. To prevent reconguring multiple lters,
assign sequence numbers in multiples of ve or another number.
The example below shows how the seq command orders the lters according to the sequence number assigned. In the example, lter 15
was congured before lter 5, but the
show config command displays the lters in the correct order.
Dell(config-ext-nacl)#seq 15 deny ip host 112.45.0.0 any log monitor 501
Dell(config-ext-nacl)#seq 5 permit tcp 12.1.3.45 0.0.255.255 any
Dell(config-ext-nacl)#show config
!
ip access-list extended dilling
seq 5 permit tcp 12.1.0.0 0.0.255.255 any
seq 15 deny ip host 112.45.0.0 any log monitor 501
Dell(config-ext-nacl)#
Conguring Filters Without a Sequence Number
If you are creating an extended ACL with only one or two lters, you can let Dell Networking OS assign a sequence number based on the
order in which the lters are congured. Dell Networking OS assigns lters in multiples of ve.
To congure a lter for an extended IP ACL without a specied sequence number, use any or all of the following commands:
• Congure a deny or permit lter to examine IP packets.
CONFIG-EXT-NACL mode
{deny | permit} {source mask | any | host ip-address} [count [byte]] [order] [monitor
[session-id]] [fragments]
• Congure a deny or permit lter to examine TCP packets.
CONFIG-EXT-NACL mode
{deny | permit} tcp {source mask] | any | host ip-address}} [count [byte]] [order] [monitor
[session-id]] [fragments]
• Congure a deny or permit lter to examine UDP packets.
CONFIG-EXT-NACL mode
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Access Control Lists (ACLs)