EcoRouter 2008 change user password

Possibility that you own or operate EcoRouter 2008 with EcoBNGOS are very low. However just in case you will have to work with this one it will be useful to know at least some basic commands. I choose user password change as it is the most important thing at first glace after setup, so: After this logout and login again to check if it is working. On some routers there…

MikroTik RouterOS 7.5 change default DNS

Want to change default DNS for the network in MikroTik’s RouterOS CLI? You can use web UI but it could have some issues preventing from configuration save, so it is nice to know how to use it via CLI. First login into the box and then: Change X with the network number of your preference. You can show them using print command at /ip/dhcp-server/network level. Last thing: the option that…

airodump-ng and aireplay-ng to deauthenticate clients from access point

Disconnecting wireless clients from access points The problem The nature of wireless networking is quite problematic because transmission goes over air and can be intercepted by anyone. Of course there is data packet stream encryption. But deauthentication frames are not encrypted and can be forged. It’s applicable to IEEE 802.11 standard. However if your device is capable of 802.11w standard amendment then the management frames are protected from forging, however…

Suricata IDS/IPS on pfSense

Detecting and preventing threats Introduction To provide security in a network you can deploy IDS or IPS systems. The difference is on the second letter, D stands for detection and P for prevention. First you start a system in IDS mode and only then you configure it to become IPS system. Enabling Suricata in IPS mode from the start could be confusing. It is advisable to see what’s going on…

Geo location with Filebeat on Elasticsearch 7, HAProxy and NGINX

Display geo location map for NGINX traffic logs in Kibana Summary There are 3 things to remember and configure in order to have geo location map working: Use “forwardfor” option on pfSense HAProxy TLS frontend Enable filebeat NGINX module and point particular log files Define custom NGINX log format This guide relates to Ubuntu Linux setup. Elasticsearch 7 First install Elasticsearch 7 as follows. Note: for more resilent setup install…

Data Mining & Exploration

Among 3 million public IP address ranges for the whole world, 68k belongs to the Russian Federation. This translates into 45 million addresses. Scanning the HTTP port on this population took 20 hours. I obtained 630k IP addresses with listening on port 80. Of which 530k gives the correct answer of the HTTP type. Only 340k gives an HTTP 200 response. Over 200k run on NGINX servers, and 100k run…

Semiconductors

The basis for the construction of diodes and transistors A semiconductor is a material whose electrical conductivity is between the conductors and insulators. Their resistance and conductivity depends on temperature and admixtures. [W] The most commercially used semiconductors are those based on silicon, and in the past also on germanium. In addition to these two elements (in crystalline form), a whole spectrum of other substances from groups 13-15 is used,…

Coil

Energy in a magnetic field [209] Just as a capacitor works by storing energy as an electric field, an inductor stores energy as a magnetic field. The energy stored in the coil is calculated in terms of current. The capacitor acts as an insulator of the circuit while the inductor acts as its conductor. The coils have inductance expressed in henry [H]. The coils are plugged into the circuit in…

WordPress quirks and features

I will start with the werid experience with one of WP themes – Polite and Polite Grid. I was wondering why my website make double requests on every page. One for the document and other for content. This was annoying as I was unable to measure traffic properly. It turned out that it was because of the theme I’ve been using for some time. Changing it to different one fixed…

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