I will give an example of updating the firmware of the Huawei Quidway S2326TP-EI switch.
First, let’s look at the current firmware version:
Author Archives: Vyacheslav
Backup MBR in Linux
Master boot record (MBR) — code and data located in the first 512 bytes of the hard disk needed to boot the operating system.
From 512 bytes of MBR code contains:
446 bytes — Bootstrap
64 bytes — Partition table
2 bytes — Signature
Configuring DHCP snooping on BDCOM P3310
For example, I will configure DHCP snooping on the BDCOM P3310C EPON OLT.
First, let’s connect to the device and go to the configuration mode:
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Difference between MASQUERADE and SNAT
In this article I will briefly describe the difference between MASQUERADE and SNAT.
MASQUERADE. Less fast routing than SNAT with mass requests, since for each new connection an IP address on the external network interface (WAN) is determined. Great for home use routers and when changing the IP address on the WAN interface.
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PPS Viewer Script (Packets Per Second)
The script every second displays the number of incoming and outgoing packets per second on the specified network interface.
Place the contents of the script into a file, for example, pps.sh and execute by specifying the name of the network interface (you can stop the execution of the script with CTRL+C):
Installing and using ipset
ipset – a tool consisting of a kernel module, libraries and utility, allowing you to organize a list of networks, IP or MAC addresses, etc., which is very convenient to use for example with IPTables.
Installation command in Ubuntu:
What to do if “Network Discovery” does not turn on in Windows
Once I noticed on one of the computers that nothing was displayed in the network environment, and after selecting “Enable network discovery” in “Control Panel \ Network and Internet \ Network and Sharing Center \ Advanced Sharing Options”, the choice was still on “Disable network discovery”.
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IPTables rules for FreeRADIUS
Suppose INPUT is the default DROP, I’ll give examples of IPTables rules for FreeRADIUS:
Continue reading “IPTables rules for FreeRADIUS”Cisco Catalyst 2960-24TT-L Firmware Update
On the test, I will upgrade the Cisco Catalyst WS-C2960-24TT-L switch.
And so, let’s connect to the switch and switch to elevated privilege mode:
enable
Let’s see the active firmware version:
show version show boot
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How to view incoming connections history in TeamViewer
When a connection is made to the computer running TeamViewer, the information about each connection is written to a text file.
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