Background This post is to demonstrate the simplest way to set up your personal Weather Forecast Email Service using basic Linux Bash Scripts and Cron job. You can put scripts on your VPS, your Rasberry PI, or any other form of Linux server. Environment Operation System: Operating System: CentOS Linux 7 (Core) Kernel: Linux 3.10. […]
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Object IPtables is probably one of the most useful tools widely integrated into the majority of the Linux Distributions, this article is to share the iptables used on my VPS in the past 7-8 years. I have hosted my personal Asterisk PBX in the VPS so I can make international calls via Twilio SIP Trunk.
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Issue After initially setting up the Fortigate 100F HA cluster, we got this annoying “out-of-sync” error, dug into it, and found several issues related to the Fortinet firmware version and initial configuration differences. This post is to document the process of troubleshooting and some of the configurations for the Fortinet HA firewall cluster. Environment 2x
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Requirement The issue arises when the customer wanted to “share” the number across two different voice systems, such as CUCM and Teams. There are multiple ways to integrate 2 systems under the same range, but it becomes challenging when users want to keep their original numbers, while some of them will stay on CUCM, some
Cisco Voice URL Voice Routing dial-peer Read More »
It is common when a business acquisition or merging occurs, to IT professionals, we would automate our task via scripting rather than going through each user’s properties and changing everything, the below simple scripts may help when you want to “bulk change” domain name, UPN, Email Attribute, Primary SMTP, SIP address in a Hybrid environment:
How to – Domain Name UPN Email Primary SMTP SIP Change Read More »
This tutorial is to illustrate the processes to configure Juniper EX switch virtual chassis and JUNOS upgrade procedures. This is one of the most common tasks in the Juniper networking world. Environment Virtual Chassis with nonprovisoned configuration file 2. Then you can check the current vc-port configuration via show virtual-chassis vc-port, there might be ports
How to – Juniper EX switch Virtual Chassis and JUNOS upgrade Read More »
Cisco unsupported SFP Errdisable port
How to fix Cisco SFP errdisable state gbic-invalid Read More »
This post is about adding watermark on WordPress pictures and troubleshooting steps when the watermark is not applying Steps Go to WordPress Dashboard, add new plugin, search “Easy Watermark”, install and activate it 2. go to “settings” – “add New Watermark” – configure the options as you want, you then can preview the change, please
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Instead of reading Cisco’s lengthy document for switch stacking and IOS XE upgrade procedure, this tutorial explains the simple steps to stack two Cisco L2/L3 switches and upgrade the IOS afterward, this is one of the most common tasks for ICT networking professionals. Environment 2x brand new Cisco 9300 switches 2x Cisco Data Stacking cable
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During a Fortinet 100D to Fortinet 100F upgrade migration, the Fortinet Firewall Migration Tool cannot recover the Fortinet IPsec VPN Pre-shared key for you, we cannot find the IPsec VPN Pre-shared key from the previous document Troubleshooting Searching and testing around seem the only fix is to update the key on both ends, however, for
How to Recover Fortigate IPsec VPN Pre-shared Key Read More »
