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Cisco Bug: CSCsz31103 - Need enhancement in Service Object Group to support L4 dest. keyword

Last Modified

Mar 26, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(24.6)T4

Description (partial)

Symptom:
========
Options to specify the L4 destination port numbers need to be developed with a 'destination' keyword in Service Object Group, to make it more user-friendly.

Currently, we do see the feasibility in service object groups that  identifies the destination port numbers and filters traffic accordingly, but it is confusing to use it without a relative keyword.
As in the case of specifying source L4 port no, we have space to say - source tcp. Similar keyword needs to be developed for destination also.

But there is no 'destination' keyword to make its usage crystal clear..

ACL-DC-72a(config)#obj
ACL-DC-72a(config)#object-group se
ACL-DC-72a(config)#object-group service test

ACL-DC-72a(config-service-group)#udp s?
snmp    snmptrap  source  sunrpc
syslog  


ACL-DC-72a(config-service-group)#udp d?
discard  dnsix  domain  


ACL-DC-72a(config-service-group)#udp s

There is no option called - 'destination'


Conditions:
=========
In the 'config-service-group' mode, the keyword -'source' makes the specified port to be taken as the source port
While the port number/name that is specified without the keyword 'source' becomes the destination port.
There is no 'destination' keyword available. So end -users get confused on how to use the l4-dest-port in the OG.
 
Object-group service srv-obj
   Tcp source 53                                            ------- source port - 53
   tcp 23                                                            ------ destination port - 23
 
Normal ACL - 
permit tcp any eq 53 any eq 23
 
Equivalent OG ACL - 
permit object-group srv-obj any any
 

It would be great if we could have 'destination' keyword supported.
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