If the DNS settings of any site have been changed and in order not to wait for the time to cache DNS records, you can manually clear them, after which the DNS client on MacOS will request new data from the DNS servers.Continue reading “How to clear DNS cache on MacOS”
I will give an example of IPTables rules for BGP.Continue reading “IPTables Rules for BGP”
By default, Postfix listens for connections on port 25/tcp and in this article I will show what needs to be done so that it starts to happen port 587 (submission), since for example in many mail clients when setting up mail, port 587 is offered by default.Continue reading “How to enable port 587 in Postfix”
The trimforce utility allows you to activate TRIM on third-party devices connected to the AHCI controller; by default, TRIM commands are not sent to third-party storage devices. The trimforce utility has appeared since OS X 10.10.4.
On original devices, TRIM is used by default and no commands need to be entered.
By default, only administrators can create repositories in Phabricator.Continue reading “Phabricator. How to allow users to create repositories”
I noticed once that on Huawei switches SNMP port indices can be shifted, for example, on Huawei s2326 VLANs are considered first, for example ifIndex.1 is vlan1, ifIndex.2, ifIndex.3, ifIndex.4 are user VLANs, and then ifIndex5 is the port Ethernet1. Because of this, when binding client services to switch ports in ABillS, the ports will not be displayed correctly.Continue reading “ABillS. SNMP Port Shift”
I will give an example of running the strace utility, which allows you to track what a process or command is doing at a given moment.Continue reading “Process monitoring through strace”
Logkeys – a utility that records keystrokes in a file.Continue reading “Installing Logkeys on Linux”
Here is an example of a primitive TrinityCore restart script for Linux:Continue reading “TrinityCore Launch Script for Linux”
Nothing complicated, just create an ACL rule, due to which on certain ports the switch will drop or pass packets that go to client port 67 from a DHCP server and thus it will not receive IP from unnecessary DHCP servers.Continue reading “Blocking DHCP packets on D-Link DES-38xx”