Category: Networking

Fixing Website Access Issues with Mikrotik MSS Clamping

17/10/2024 / Internet, IT, Networking

If you’re having trouble accessing certain websites—like partial page loads or dropped connections—your network’s Maximum Segment Size (MSS) may be the issue. This is common when the MTU (Maximum Transmission Unit) is mismatched across the network, causing packet fragmentation or loss. The problem is mostly on some “really” safe websites like banks, government, etc. The […]

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Zabbix – how to monitor clients on Mikrotik Capsman

29/07/2024 / IT, Networking, Tutorials, Zabbix

Hello, I want to share my solution for monitoring connected clients to CapMan interfaces on Mikrotik in the Zabbix monitoring system. First, for the Zabbix server part, to get data from Mikrotik Capsman we will use the Python script to communicate with Mikrotik API. The Zabbix server needs access to the Mikrotik API, so if

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Mikrotik – failover script with link quality check

26/01/2023 / IT, Networking, Programming

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Mikrotik – DHCP Options – TFTP server

01/12/2022 / IT, Networking, Tutorials

Sometimes you need to push the TFTP server value as part of the DHCP process, for example, this is used in most VoIP systems. The VoIP phone use the TFTP server to download configuration files. Here I will show you how to set this value in the Mikrotik DHCP server. 1. Boring stuff The boring

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Standard ICMP return TTL values by OS

22/12/2021 / IT, Networking, Security

Here are the default TTL values of different devices / Operating Systems : Device / OS Version Protocol TTL AIX TCP 60 AIX UDP 30 AIX 3.2, 4.1 ICMP 255 BSDI BSD/OS 3.1 and 4.0 ICMP 255 Compa Tru64 v5.0 ICMP 64 Cisco ICMP 254 DEC Pathworks V5 TCP and UDP 30 Foundry ICMP 64 FreeBSD 2.1R

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Apache – Top 10 IP addresses accessing your Apache webserver

31/03/2021 / IT, Linux, Networking, Tutorials

Default log paths /var/log/http/access_log [For RedHat based systems] /var/log/apache2/access.log [For Debian based systems] /var/log/http-access.log [For FreeBSD] Command Output 5482 103.28.37.1785356 66.249.78.1681977 66.249.93.1451962 157.55.39.2511924 66.249.93.1421921 66.249.93.1481890 64.233.173.1781860 108.61.183.1341841 64.233.173.1821582 157.55.39.251 Command explain awk ‘{ print $1}’ access.log – take the access.log and print first group (separated by white space) sort – sort records uniq -c –

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SilverCrest wireless door bell – forget learned devices – solved

07/08/2020 / IoT, IT, Networking, Programming, Tutorials

Device: HG04115A-RX IAN: 303733 This week I had to change the battery in my cheap wireless doorbell device from Lidl shop. But unfortunately when I was a pairing device somebody open doors with a 433MHz contact sensor and the receiver learn it as a wireless button. It is quite funny because I inadvertently invented cheap

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Unable connect Windows 10 to Mikrotik L2TP/IPsec behind NAT – Solved

04/08/2020 / IT, Networking, Windows

Open regedit (Windows + R -> regedit -> enter) find key : Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\PolicyAgent. Create new DWORD value with name : AssumeUDPEncapsulationContextOnSendRule and value 2 Restart PC and enjoy the L2TP/IPsec without problems.

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Windows – map network driver from CMD

09/08/2019 / IT, Networking, Tutorials, Windows

Sometimes you need map network drivers in command line(cmd) for example if you are preparing some .bat files etc. At Windows, it is quite simple all you need is net use command. Quite simple right? No big deal. One note to end. All user got their own mapped drives. So if you open command lines

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Get MAC address of AP what your WiFi is connected

07/08/2019 / IT, Networking, Windows

Sometimes you need to know exactly what AP your windows device is connected to for example if you are tuning your multi-AP network where many AP got the same SSID. The value what are you looking for is named BSSID. Windows At Windows you need to open command line (Win+R and type cmd enter) macOS

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