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Access List Vlan

Access List Vlan

Access List Vlan


I have created in our switch core the below access list.

access-list 100 permit ip any
access-list 100 remark --[Allow Guest DNS requests to DNS Server]--
access-list 100 permit udp host eq domain
access-list 100 remark [Necessary for DHCP Server to receive Client requests]
access-list 100 permit udp any any eq bootps
access-list 100 permit udp any any eq bootpc
access-list 100 remark --[Deny Guest Access to other VLANs]--
access-list 100 deny ip log
access-list 100 deny ip log
access-list 100 deny ip log
access-list 100 deny ip log
access-list 100 deny ip log
access-list 100 remark --[Permit Guest Access to everywhere else -Internet ]--
access-list 100 remark

Then in the Vlan 100 I have:

interface Vlan52
ip address
ip access-group 100 in
ip helper-address

The users that are connected to the Vlan100 they can navigate the internet, and thats fine, the problem, is that, they can still access the other vlans, I have connected to the vlan100 from my ipad, and I can scan all the other vlans. I want the vlan 100 to not be able to scan the other vlans or access the other vlans.
What I am doing wrong?

thank you

RE: Access List Vlan

Is this switch the default gateway for this VLAN (

RE: Access List Vlan

yes,each vlan has switch gw .251

and so on.

RE: Access List Vlan

You have a permit to any at the top of the ACL - its top-down processing so all your traffic entering VLAN 52 will match this and be accepted by the ACL?

RE: Access List Vlan

access-list 100 permit ip any

this is matching for pretty much all traffic..

put it after the denys

We must go always forward, not backward
always up, not down and always twirling twirling towards infinity.

RE: Access List Vlan

thank you very much. After changing the order is working fine.

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