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Vlan acl issue

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  • 1.  Vlan acl issue

    Posted Jan 28, 2024 01:47 AM

    I'm trying to create an acl and I can't get it working right. I am trying to block vlan 7 from vlan 18, but not Vlan 18 from vlan 7. I created the acl below and applied it to vlan 7 with IP access-group vlan7acl in. Problem is it is blocking vlan 7 from 18 and vlan 18 from vlan 7. I feel like it should work the way I want it to, but isn't. Thank you.

    10 deny ip 10.0.10.0/23 10.0.18.0/23

    Permit ip any any



  • 2.  RE: Vlan acl issue

    Posted Jan 28, 2024 12:32 PM

    Hi,

    I assume you have tested connectivity to work without acl(?) Also assuming that vlan7 = 10.0.10.0/23 and vlan18 = 10.0.18.0/23. Which switch model we are talk about? (I assume L3 version >=6200)

    If you put such ACL to vlan7's outbound traffic, you cannot get answer back from vlan7 to vlan18. I think you need stateful system to control traffic such way?



    ------------------------------
    Jori Luoto
    AV-IT Specialist
    ------------------------------

    Original Message


  • 3.  RE: Vlan acl issue

    Posted Jan 28, 2024 03:09 PM
    Sorry about that. I thought I added it. We use 2930m switches. They have been in place for a couple of years with vlans, etc.. Connections between the vlans work. I'm just looking to start segmenting things. 

    --
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    Matt Gross
    Technology Coordinator
    Egg Harbor City Public School District
    730 Havana Avenue
    Egg Harbor City, NJ 08215
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    Email: mgross@eggharborcityschools.com
    Website: www.eggharborcityschools.com

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    Original Message