Blogs
Service Status via SaltStack 2014.7 with Nagios
Exploring SaltStack 2014.7's nagios module: remote execution of nagios-plugins on minions, pillar-defined check lists with Jinja templating, distributed monitoring ideas, and contributing documentation fixes to SaltStack.New and Removed ASNs
Automating Canadian ASN discovery using Blockfinder: daily diff emails tracking ARIN assignments, patching TTY progress bar issues for cron jobs, and proposing ARIN's arin-issued list for AS numbers (later implemented).Troubleshooting ICMPv6 with tcpdump
Fixing OpenBSD PF firewall ICMPv6 rules by using tcpdump to identify required neighbor discovery types (133-137): isolating NDP traffic with packet filters and properly allowing router/neighbor solicitation/advertisement messages.Internet Connection Sharing
Tracking down rogue DHCP server on corporate network: using arpwatch to identify Mac sharing causing 192.168.137.x leases, correlating MAC to CDP/switch port, and why DHCP snooping prevents these issues.SSLv3 Disabled
Responding to POODLE vulnerability by disabling SSLv3 across all services: enforcing TLSv1.0+, updating cipher suites from Mozilla wiki, logging protocol/cipher combinations to verify modern client support.