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Ebin Issac

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Fixing intermittent connectivity issues between AWS Site-to-Site VPN and Sophos firewalls

Posted on April 6, 2020 by Ebin Issac

So if you setup a VPN between an AWS account and an on premise network with a Sophos firewall as the customer end device, it should work perfectly if you only have one route to the on premise network. But, when you start adding more routes to the VPN, you will start seeing connection dropping […]

Posted in TECHNOLOGYTagged AWS, firewall, networking, sophos, vpn

How to send IM in teams from Outlook

Posted on October 25, 2019 by Ebin Issac

So if your employer migrated from Skype for Business to teams, it is going to be an annoying change because by default you will not be able to send IMs to Teams from outlook unlike Skype used to be. But with a small change in Teams it is possible. – Open Teams – Click on […]

Posted in TECHNOLOGYTagged sysadmin, windows

How to delete all links to external references in Excel in one click – Not by clicking “break links”

Posted on October 12, 2019October 12, 2019 by Ebin Issac

So at my job I have to make a lot excel files and most of the time I just re-use some of the templates that are created by some of my colleagues. The problem with that is, there are so many links in those excels to either their home folders, or some sites which I […]

Posted in TECHNOLOGYTagged excel, sysadmin, TECHNOLOGY

This site is now serverless!!

Posted on August 6, 2019August 11, 2019 by Ebin Issac

This site is now serverless – well, sort of. I was paying around $85 per year with hosting on WordPress.com, and now I guess it will be less than $40 per year. I am not really interested in posting a big how to guide on that, but I used the below tools for this setup. […]

Posted in Personal, TECHNOLOGYTagged AWS, Serverless, Wordpress

My experience with AWS Certified Solutions Architect – Professional (SAP-C01) exam – June 2019

Posted on June 17, 2019July 29, 2019 by Ebin

On June 12, 2019, I passed my fourth AWS certification – AWS Certified Solutions Architect – Professional. I would like to share my experience with it. The last time I used AWS professionally was on 2017 December. Ever since I joined Accenture, I was working on some private cloud, and never really had a chance […]

Posted in PersonalTagged AWS

How to use sudo in powershell

Posted on April 5, 2019July 30, 2019 by Ebin

Well this is not exactly same as sudo. However it is very annoying when I want to run something in powershell and it gives me access denied. And then  I need to go to start menu, or task bar, right click, select run as administrator etc just to run one command. As someone who likes […]

Posted in TECHNOLOGYTagged powershell, sysadmin, windows

How to fix AWS SES domain and DKIM verification failures in Godaddy domains

Posted on March 11, 2019July 30, 2019 by Ebin

When we try to register a domain with AWS SES, they will ask us to add some TXT records in our DNS records. The sample TXT record that AWS asks us to add will be  as follows : Name Type Value _amazonses.example.com TXT pmBGN/7MjnfhTKUZ06Enqq1PeGUaOkw8lGhcfwefcHU= However, if we add this in our Godaddy console, AWS is […]

Posted in TECHNOLOGYTagged AWS, DNS, godaddy

How to change the OpenSSH server port in Windows

Posted on February 25, 2019July 30, 2019 by Ebin

The installation for OpenSSH server in Windows is quite straightforward, as all we need to do is to follow the instructions here. However, it took a while for me to figure out how to change the listening port. Especially, in the installation folder, there is a sshd_config_default file. Changing this does not make any difference. […]

Posted in TECHNOLOGY

TIL how to disable the timeout of mapped drives in Windows

Posted on January 28, 2019July 30, 2019 by Ebin

I was trying to copy some big files over the network to another server, and I mapped the destination drives in the local server for easy copying. However I kept getting errors in my script, which I suspected because the drives getting disconnected. Here is how to set it to not disconnect. Run as administrator […]

Posted in TECHNOLOGYTagged sysadmin, windows

TIL how to check the bandwidth between 2 servers

Posted on January 21, 2019July 30, 2019 by Ebin

We subscribed for a dedicated line between 2 datacenters, and when we were trying to copy some files over, it was really slow. We were supposed to get few MB/s transfer rate, but were getting only 20KB/s which was unacceptable. We needed to make a clear case with the service provider to get their support […]

Posted in TECHNOLOGYTagged Linux, sysadmin, windows

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