Nmap features

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Nmap is an opensource software that apparently scans IPs and TCP/UDP ports. But it can do more! In association with scripts, it can able to analyze targets at layer 7. In fact Nmap is loaded with a scripting engine aka NSE (Nmap Scripting Engine) that transform this tool in a vulnerability scanner. For a complete list of scripts look here! …

BGP routes leak. Why?

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Yesterday, 20190624, a routes leak hit majors Internet player like Cloudflare, Verizon and Amazon AWS that were obfuscated by a network outage. An impressive recon and report were made by CloudFlare that early detect the problem and helped AS33154 to solve the problem. You can find the complete report here. But what happened? Briefly, it seems that a BGP protocol …

Blackholing a Customer Edge

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Protecting the internal network or a public network segments is the Network Engineer mission’s. Usually, we have firewalls for the perimetral security, but how do we do if we want to protect public transit IP? Some public IP addresses configured on Customer Edge Routers, provide only the traffic routing from the client side to the ISP so there is no …