InfoSec Guy, Coder, Maker, Hacker. Opinions are my own.

Is Your Browser Safe?

Qualys [1] has a nice tool called “Qualys Browser Check” [2] for verifying if your browser runs on the most current version. It also checks if your plugins are up to date. These days, computers are exploited using browsers or browser plugins which contain some vulnerabilities, even 0-days. Therefore, it is very important to keep…

Total Internet Surveillance for Swiss Citizens?

According to federal councillor Simonetta Sommaruga, investigators should soon be able to monitor Internet traffic of Swiss citizens in real-time. By changing the “Verordnung über die Überwachung des Post- und Fernmeldeverkehrs (VÜPF)” act, the legal base shall be provided. This forces Swiss internet providers to build infrastructure for these monitoring services. Besides the fact, that…

Wireshark TCP Debugging

GProbe, my C/C++ port scanner project which uses a raw sockets implementation, has moved on to the next step. The TCP SYN scan functionality finally works. But there were some pitfalls until that point. What to do, when your peer doesn’t reply As soon as I accomplished the task of getting my tool to send…

News about GProbe

The last few weeks I have been busy implementing my port scanner utility. I have done a lot of testing and reading about the protocols of the TCP/IP stack, especially ICMP. Although ICMP is a rather simple protocol to implement, there was an error, which was very annoying. Today was the day, when I found…