All Questions
Tagged with acl cisco-commands
6 questions
10
votes
3
answers
15k
views
Cisco: prevent vlan's of communicating with eachother on cisco router (ACL alternative)
Setup: Cisco router with multiple VLAN's configured on it.
How can you prevent 2 VLAN's communicating with eachother? Normally I would do this with ACL's like this:
access-list 102 deny ip 1.1.1.0 0....
- 2,393
2
votes
1
answer
4k
views
How does a Cisco ACL handle fragments
We have an ASR1000, and I have the following ACL, but yesterday someone hit us with big DDoS attack, and I found it was a DNS amplification attack. so all source port for 53, and it was definitely a ...
- 4,389
2
votes
1
answer
1k
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Firewall and VPN functionalities for a Cisco ISR4321 V/K9
I would like to know if I can setup ACLs with the access-list command with a Cisco ISR4321 V/K9.
Are there restrictions (in comparison with a Cisco ISR4321 VSEC/K9)?
Note the SEC part in the reference....
- 399
2
votes
2
answers
193
views
Simple ACL question
I'm still new to networking and have a question or problem I need to solve, but I'm not sure how to move forward. I need to stop PC0 from Vlan10 from talking to PC5 in Vlan30, but he must be able to ...
- 63
1
vote
1
answer
55
views
How do i set this ACL on the router
I was told in a previous answer to use
ip access-list extended TEST
deny ip host <PC0 address> host <PC5 address>
permit ip any any
But, whats the command to set it on the router ...
- 63
1
vote
2
answers
839
views
Cisco extended ACL not permitting traffic according to rules
this is my network topology diagram:
Networks that are outlined in the bottom are actually vlans 10, 20, 30, 40, 50
defined on switches S1 and S3.
The routers R3 and R2 for the network have ...
- 11