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spopuri's avatar
spopuri
Aspirant
May 08, 2020
Solved

ACL rules M4300

I would like to create extended ACL's to allow only DHCP and DNS from a subnet to a server.

 

 

 

 

  • Retired_Member's avatar
    Retired_Member
    May 09, 2020

    spopuri 

     

    On Web GUI, when you create new rule for the IP ACL, only need input 4 fields as below, all other parameter just keep default config:

    Sequence Number: input any value is ok;

    Action: Permit

    Protocol Type: UDP

    Dst L4: input 53/67/68

     

     

    The ending deny everything rule is default behavior, no need config by manual.

     

    Then go to 'IP Binding Configuration' page, select the correct port that you want to apply this IP ACL rule.

     

11 Replies

  • Retired_Member's avatar
    Retired_Member

    Hi spopuri ,

     

    Welcomet to Community!

     

    Suggest you config IP ACL to meet your requirement.

    As both DHCP and DNS is based on UDP protocol, so you can create one IP ACL with 3 rules(permit udp destination port 53/67/68). Then binding the IP ACL to the pyhsical port or VLAN.

    For detailed ACL configuration, please refer to link (Software Administration Manual: Page 171)

     

    Below is the example config:

     

    ip access-list test
    permit udp any any eq domain
    permit udp any any eq 67
    permit udp any any eq 68
    exit


    interface 1/0/1
    ip access-group test in 1
    exit

     

    Hope it helps!

     

    Regards,

    Eric

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