Cisco 3850 Upgrade

These steps are from a high level view and cover the overall process.  Some steps are omitted.  Download the IOS and place it on a thumb drive, or tftp etc. copy tftp://yourtftpsite/cat3k_caa-universalk9.SPA.03.07.05.E.152-3.E5.bin flash: (this may take several minutes to complete) When complete: software install file flash:cat3k_caa-universalk9.SPA.03.07.05.E.152-3.E5.bin After reboot/reload etc. software clean After the switch is … Read more

Duplicati 2.0

Free backup software to store encrypted backups online. For Windows, macOS and Linux Many Backends Duplicati works with standard protocols like FTP, SSH, WebDAV as well as popular services like Backblaze B2, Microsoft OneDrive, Amazon S3, Google Drive,, Mega, hubiC and many others.

Check Flash Wear

How to check flash wear via PowerShell within Windows 10 To check the wear value of an internal SSD drive via PowerShell within Windows 10, launch an elevated PowerShell session and use the following command. Get-PhysicalDisk | Get-StorageReliabilityCounter | Select Wear Not all drives accurately report this value to Windows. In some cases, the counter … Read more

Know about SAN Certificate and How to Create With OpenSSL

Original here –  Reduce SSL cost and maintenance by using single certificate for multiple websites using SAN certificate SAN stands for “Subject Alternative Names” and this helps you to have a single certificate for multiple CN (Common Name). You might be thinking this is wildcard SSL but let me tell you – it’s slightly different. In … Read more

Self-Signed Wildcard certificate with SAN using openssl / SSL

Copy the default template of openssl.cnf to a writable location. cp /System/Library/OpenSSL/openssl.cnf src Uncomment the req_extensions = v3_req req_extensions = v3_req # The extensions to add to a certificate request Add subjectAltName to v3_req section [ v3_req ] # Extensions to add to a certificate request basicConstraints = CA:FALSE keyUsage = nonRepudiation, digitalSignature, keyEncipherment subjectAltName = @alt_names Add the … Read more

Clear IP Tables (Firewall)

First, set the default policies for each of the built-in chains to ACCEPT. The main reason to do this is to ensure that you won’t be locked out from your server via SSH: iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -P OUTPUT ACCEPT Then flush the nat and mangle tables, flush all chains … Read more