Tailscale on Cisco ISR4k

Tailscale & IOx

I absolutely love using tailscale. It uses a great new protocol, wireguard, but makes it easy to configure and use. I’ve used it as a VPN service for over a year now, but have always wanted to connected to devices that are not tailscale capable.

0x8000 is the new 0x4124

On new ISR routers with XE-SDWAN version 16.10.3+, you can only log in with the default password once. Over console, there is a message printed that warns you to change the password, but it can easily get lost in all the other console output.

Automating Certificate Install on ASA with Netmiko

Here is a little script I wrote to automate putting certificates onto ASAs. It also activates the cert on the inside interface (mine is a one-armed VPN concentrator). The cert is assumed to already in the correct format and named asabase64.cert.

Dell S-Series OS10 Image Upgrade

I keep having to look this up, so I’m just going to write it here quick.

1. Download firmware (finally on dell.com)
2. Copy to usb stick or tftp server
3. Do the upgrade.