Added Cisco SB SSH key exchange exemption for deprecated weak algos

content/docs/network/architecture.md

@@ -1,6 +1,6 @@
 ---
 title: Network architecture
-weight: 2
+weight: 1
 #bookFlatSection: false
 bookToc: true
 # bookHidden: false

content/docs/network/cisco-small-business.md

@@ -1,16 +1,32 @@
 ---
 title: Cisco Small Business Switches
-descriptions: empty description
+descriptions: Setup of a Cisco Small Business switch, mainly the SG300 and SG350XG lines.
 summary: empty summary
-weight: 2
+#weight: 2
 categories:
-- Shell
-- zsh
+- Cisco
 tags:
-- .zshrc
+- Cisco
+- SSH
+- Keys
 ---
-# Caput vino delphine in tamen vias
 
-## Cognita laeva illo fracta
+# SSH login with newer OpenSSH versions
+Newer SSH versions, e.g. OpenSSH 8.4p1 of Ubuntu 20.10, are more restrictive on the key exchange algorithms they allow for connecting to servers because these algorithms are weak from a todays point of view, see [OpenSSH Legacy documentation](https://www.openssh.com/legacy.html) for details. At least for my SG350X, I hope that there will be a firmware update in the future providing support of modern SSH key exchange algorithms.
 
-Lorem markdownum pavent auras, surgit nunc cingentibus libet **Laomedonque que**
+Nevertheless, it's my local network and it is quite safe. So you just need to configure an exception for these hosts to use the older algorithmens. That's achieved by adding them to your ``~/.ssh/config`` file:
+```ini
+host sg300-kg-server
+        KexAlgorithms +diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
+        user cisco
+```
+
+## Current software releases installed on my switches
+
+|Hostname|Model|Installed version (build date)|Most current version|
+|--|--|--|--|
+|sg350-kg-1|SG350X-24P-K9|2.5.8.15 (2021-11-16)|2.5.8.15 (2021-11-16)| # images_tesla__hybrid...
+|sg300-kg-server|SG300-20|1.4.11.5 (2020-04-08)|1.4.11.5|
+|sg300-dg-1|SG300-10P|1.4.11.5 (2020-04-08)|1.4.11.5|
+
+# Configuring SSH public key authentication

content/docs/network/mikrotik-switch.md

@@ -0,0 +1,13 @@
+---
+title: Mikrotik Switch Setup
+descriptions: Configuration of Mikrotik switches
+summary: empty summary
+#weight: 2
+categories:
+- Cisco
+tags:
+- Cisco
+- SSH
+- Keys
+---
+# test