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Filtering packets by TTL in Cisco ACL

As I make progress through the INE workbooks I’m writing posts about features that I find interesting and that might not be that known to the general public. I wasn’t aware that you could filter packets based on TTL in

ddib March 3, 2011 CCIE, Security, Traceroute 1 Comment Read more

Cisco ASA – Efficient access-lists with object-groups

I am currently migrating some PIX firewalls to ASA and I have been rewriting the access-lists to be more efficient and easy to read. This is done by using objects and object-groups. Lets first talk about objects, the object can

ddib September 2, 2010 Security No Comments Read more

Cisco ASA 5510 – Where did my gigabit ports go?!

I’m preparing some ASA 5510 firewalls at work which are going to replace two Cisco Pix firewalls. We ordered the ASA5510-SEC-BUN-K9 because we need failover and the gigabit ports. I unpacked the firewall and booted it up but when I

ddib August 6, 2010 Security 2 Comments Read more

Authentication, authorization and accounting

Authentication, authorization and acounting is commonly called AAA. If you have more than a few network devices using local user accounts is not a scalable solution. The solution is to centralize the authentication either via a TACACS+ or a RADIUS

ddib August 5, 2010 Security 4 Comments Read more
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