TMA-DB2-DISCOVER
Ensure DISCOVER is set to DISABLE
LowLevel 2Automateddb2
Description
DISCOVER=SEARCH lets the instance answer network discovery requests, advertising instances and databases to anyone on the network. Run as the instance owner (or with sqllib/db2profile sourced) so 'db2 get dbm cfg' reads the instance configuration.
How it is checked
Audit method: Shell command
shell
out=$(db2 get dbm cfg 2>/dev/null) || exit 1; printf '%s\n' "$out" | awk -F= '/\(DISCOVER\)/ {v=$2; gsub(/[ \t]/, "", v); f=1} END {if (f && (v == "DISABLE")) print "compliant"; else print "noncompliant: " v}'- Expected output
compliant
How it is fixed
Fix method: Guidance or infrastructure patch
db2 update dbm cfg using DISCOVER DISABLE; then db2stop && db2start
Properties
- Operating systems
- Any
- Tags
- db2databasenetwork
- Reference
- CIS IBM Db2 Benchmark - Instance Configuration / Discovery (verify section number for your release)
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
shell
tmaegis scan --target db2 --level 2