Blog Archives

Cisco ASA firewall and ICMP traffic

In this video I explain how ICMP Traffick (like pings, echo, echo-reply) is handled in the firewall. The ICMP packets are being handled in 3 different ways depending if the traffic is to the box, from the box or thru

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Posted in Cisco Security, Security

Cisco ASA builtin scp server

The Cisco ASA contains a builtin scp server. By enabling that you can use the scp protocol to transfer files to and from the server using an scp client. scp is a secure file transfer protocol. It is almost like

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Posted in Cisco Networking, Cisco Security

Cisco Ironport WSA – what happened?

I have recently implemented a few Cisco Ironport WSA-solutions. When doing a follow-up after the implementation, the customer usually reacts with “Oh… WSA? We forgot about that. It probably works…” But what difference does it make? If the customer forgets

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Posted in Cisco Security, Uncategorized

Private ipv4 addresses as a security reason not to convert to ipv6?

 I while ago I got into a discussion with one of my customers regarding ipv6. He told me that one reason not to migrate to ipv6 was for security.  – I dont want to tell the entire world what IP

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Posted in Cisco Security

Another missing ASA-feature: telnet and ssh client

Every single decent Cisco-device on earth has the ability to make an CLI-user jump to another device with telnet or ssh. Except the ASA. I really wish that this feature could be added. Right now I am troubleshooting a firewall

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Posted in Cisco Security


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