chore: initial import from KNEL/PFVCluster@041d311 [#769]

Split per O&M lane work order. Full history: KNEL/PFVCluster. https://projects.knownelement.com/issues/769#note-4152
2026-09-03 21:39:35 -05:00
commit 7a899b8ac6
67 changed files with 7166 additions and 0 deletions
@@ -0,0 +1,34 @@
+#!/bin/bash
+# identify-hosts.sh — identify all live hosts on a network via DNS/SNMP/SSH
+# Usage: bash identify-hosts.sh <hosts-file-or-subnet>
+#   bash identify-hosts.sh 192.168.0.0/22
+#   bash identify-hosts.sh /tmp/live-hosts.txt
+set -u
+COMMUNITY="${SNMP_COMMUNITY:-kn3lmgmt}"
+
+if [ -f "${1:-}" ]; then
+  HOSTS=$(cat "$1")
+elif [ -n "${1:-}" ]; then
+  HOSTS=$(nmap -sn -n "$1" 2>/dev/null | grep 'Nmap scan report' | awk '{print $5}')
+else
+  echo "Usage: $0 <hosts-file-or-subnet>"
+  exit 1
+fi
+
+printf "%-16s %-30s %-25s %-20s\n" "IP" "DNS_NAME" "SNMP_SYSDESCR" "SSH_BANNER"
+printf "%-16s %-30s %-25s %-20s\n" "--" "-------" "-------------" "----------"
+
+for ip in $HOSTS; do
+  # DNS reverse
+  rdns=$(dig +short -x "$ip" 2>/dev/null | head -1 | sed 's/\.$//')
+  [ -z "$rdns" ] && rdns="(no-ptr)"
+
+  # SNMP sysDescr (first 25 chars)
+  snmp=$(timeout 3 snmpget -Oqv -v2c -c "$COMMUNITY" "$ip" 1.3.6.1.2.1.1.1.0 2>/dev/null | head -1 | tr -d '"' | cut -c1-25)
+  [ -z "$snmp" ] && snmp="-"
+
+  # SSH banner (quick)
+  ssh_banner=$(timeout 3 bash -c "echo > /dev/tcp/$ip/22" 2>/dev/null && echo "ssh:open" || echo "-")
+
+  printf "%-16s %-30s %-25s %-20s\n" "$ip" "$rdns" "$snmp" "$ssh_banner"
+done