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Technical notes, renewable energy projects, useful fixes and updates.

Computing

DHCP – DORA

DHCP Process Discover – Client sends a broadcast Discover Offer – Server replies with an offer of IP details Request – Client has received…

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Computing

SSH Notifications via email

IP=”$(echo $SSH_CONNECTION | cut -d ” ” -f 1)”HOSTNAME=$(hostname)NOW=$(date +”%e %b %Y, %a %r”) echo ‘Someone from ‘$IP’ logged into ‘$HOSTNAME’ on ‘$NOW’.’ |…

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Computing

Function of the Mikrotik Firewall

Stop unathorised access Block unwanted ports Classify and mark connections and packets for QOS or Routing Policy Firewall Functions: Filter packets using filter rules…

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Mikrotik

SSH from one Mikrotik to another

OverviewRouterOS provides SSH client that supports SSHv2 logins to SSH servers reachable from the router. RequirementsFor this command to be available router has to…

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Computing

Add Webmin to FirewallD

The below will open tcp port 10000 on FirewallD to get access to webmin firewall-cmd –permanent –zone=public –add-port=10000/tcp A reload of FirwwallD is needed…

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