ISE Posture and Policy Audit

Comprehensive security posture assessment of Cisco Identity Services Engine (ISE) deployment. Reviews authorization policies for over-permissiveness, identifies endpoints without posture compliance, detects profiling gaps, analyzes the TrustSec SGT/SGACL matrix, and validates active session health.

When to Use

•Periodic ISE policy compliance audit (SOC2, PCI-DSS, NIST 800-53, HIPAA)
•Pre-deployment review before onboarding new endpoint types
•Post-incident review to identify policy gaps that allowed lateral movement
•TrustSec segmentation validation
•Profiling accuracy assessment after network changes
•Quarterly access control hygiene check

How to Call the ISE MCP Tools

All ISE tools are called via mcp-call with the ISE MCP server command:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" TOOL_NAME '{"param":"value"}'

Audit Procedure

Step 1: Clear Cache and Establish Baseline

Start every audit with a fresh cache to ensure current data:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" clear_cache '{}'

Verify connectivity and cache state:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" get_cache_stats '{}'

Step 2: Authorization Policy Review

Pull all policy sets, then drill into authorization rules:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" network_access_policy_set '{}'

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" network_access_authorization_rules '{}'

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" network_access_authentication_rules '{}'

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" network_access_conditions '{}'

Authorization Policy Checks:

Check	What to Look For	Severity If Found
Default Allow	Default rule granting PermitAccess or DenyAccess without conditions	CRITICAL
Overly permissive rules	AuthZ rules with no posture condition and full network access	CRITICAL
Stale rules	Rules referencing deleted/unused identity groups or conditions	HIGH
Rule ordering	Permissive rules ranked above restrictive rules (shadowing)	HIGH
Missing posture check	AuthZ rules that grant access without posture assessment	MEDIUM
Duplicate conditions	Multiple rules with identical match criteria	LOW

Step 3: Posture Compliance Assessment

Review endpoints and identity groups to identify posture gaps:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" endpoints '{}'

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" identity_groups '{}'

Posture Compliance Checks:

Check	What to Look For	Severity If Found
Endpoints bypassing posture	Endpoints with full access but no posture assessment recorded	CRITICAL
Non-compliant endpoints on network	Endpoints marked non-compliant but not quarantined	CRITICAL
Missing posture policy for endpoint type	Endpoint categories (BYOD, IoT, contractor) without posture rules	HIGH
Posture reassessment interval	No periodic reassessment configured (one-time posture only)	MEDIUM
Unknown endpoints with access	Endpoints in "Unknown" group with network access beyond guest	HIGH

Step 4: Profiling Coverage Analysis

Assess how well ISE is profiling connected endpoints:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" profiler_profiles '{}'

Cross-reference with the endpoint list from Step 3.

Profiling Checks:

Check	What to Look For	Severity If Found
Unknown endpoint ratio	More than 10% of endpoints profiled as "Unknown"	HIGH
Unmatched profiles	Custom profiles with zero matched endpoints (dead profiles)	LOW
Missing critical profiles	No profiles for known device types on the network (printers, phones, cameras)	MEDIUM
Profile certainty	Endpoints with low certainty factor (< 20) receiving production access	HIGH
Profiling probe coverage	Insufficient probe types enabled for accurate classification	MEDIUM

Step 5: TrustSec SGT Matrix Analysis

Review Security Group Tags and their access control:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" trustsec_sgts '{}'

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" trustsec_sgacls '{}'

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" trustsec_egress_matrix_cell '{}'

TrustSec Checks:

Check	What to Look For	Severity If Found
Permit-all SGACLs	SGACLs with `permit ip` (no restrictions between segments)	CRITICAL
Missing matrix cells	SGT-to-SGT pairs with no defined policy (defaults to permit or deny?)	HIGH
Unused SGTs	SGTs defined but assigned to zero endpoints	LOW
Overly broad SGTs	Single SGT assigned to endpoints with different trust levels	HIGH
No deny logging	SGACLs with deny rules but no `log` keyword	MEDIUM
Flat segmentation	Fewer than 3 SGTs defined (minimal micro-segmentation)	HIGH

Step 6: Active Session Health

Review current active sessions for anomalies:

bash

ISE_BASE=$ISE_BASE USERNAME=$ISE_USERNAME PASSWORD=$ISE_PASSWORD python3 $MCP_CALL "python3 -u $ISE_MCP_SCRIPT" active_sessions '{}'

Session Health Checks:

Check	What to Look For	Severity If Found
Long-lived sessions	Sessions active for > 24 hours without reauthentication	MEDIUM
Failed auth spikes	Multiple failed authentications from same MAC/IP in short window	HIGH
Guest on production VLAN	Guest-profiled endpoints on non-guest VLANs	CRITICAL
Multiple MACs per port	More than expected endpoints on a single switchport (hub or rogue AP)	HIGH
Auth method mismatch	Endpoints using MAB when 802.1X is expected for that device type	MEDIUM

Severity Rating Criteria

CRITICAL -- Immediate risk of unauthorized access or data exfiltration:

•Default permit-all authorization rules
•Non-compliant endpoints with unrestricted access
•Guest endpoints on production VLANs
•Permit-all SGACLs between untrusted and trusted segments

HIGH -- Significant policy gap that could be exploited:

•Unknown endpoints with production access
•Missing TrustSec matrix entries
•Stale or shadowed authorization rules
•Low-certainty profiling with production access

MEDIUM -- Policy weakness that should be addressed this cycle:

•Missing posture reassessment
•Auth method mismatches
•Insufficient profiling probes
•Long-lived sessions without reauth

LOW -- Housekeeping and hygiene items:

•Unused SGTs or dead profiles
•Duplicate authorization conditions
•Minor documentation gaps

Audit Report Format

code

ISE Posture Audit Report
ISE Deployment: $ISE_BASE
Audit Date: YYYY-MM-DD

CRITICAL FINDINGS (Immediate Action Required):
  1. [C-001] Default AuthZ rule grants PermitAccess — all unmatched endpoints get full access
  2. [C-002] 14 endpoints marked non-compliant but not quarantined
  3. [C-003] SGACL "Permit_All" applied to IoT-to-Server matrix cell

HIGH FINDINGS (Address This Week):
  4. [H-001] 23% of endpoints profiled as "Unknown" — profiling gap
  5. [H-002] SGT "Employees" assigned to both corporate laptops and contractor devices
  6. [H-003] 3 authorization rules shadowed by permissive rule at rank 1

MEDIUM FINDINGS (Address This Month):
  7. [M-001] No posture reassessment configured — one-time check only
  8. [M-002] 47 sessions active > 24h without reauthentication
  9. [M-003] 12 endpoints using MAB instead of expected 802.1X

LOW / INFORMATIONAL:
  10. [L-001] 5 unused SGTs: "Test_SGT", "Legacy_Printers", etc.
  11. [L-002] 3 profiler profiles with zero matched endpoints

Summary: 3 Critical | 3 High | 3 Medium | 2 Low

Policy Sets Reviewed: N
Authorization Rules Reviewed: N
Endpoints Analyzed: N
SGTs Evaluated: N
Active Sessions Checked: N

Integration with Other Skills

•Use pyats-security to verify device-side 802.1X configuration matches ISE policy (RADIUS server config, dot1x port settings, CoPP for RADIUS traffic)
•Use gait-session-tracking to record the full audit in the GAIT immutable audit trail
•Use markmap-viz to visualize the ISE policy hierarchy (Policy Sets > AuthZ Rules > Conditions > Results)
•Use ise-incident-response when a CRITICAL finding requires immediate endpoint investigation
•Use servicenow-change-workflow to create Change Requests for ISE policy remediation

GAIT Audit Trail

After completing the audit, record the session in GAIT:

bash

python3 $MCP_CALL "python3 -u $GAIT_MCP_SCRIPT" gait_record_turn '{"input":{"role":"assistant","content":"ISE posture audit completed. ISE: $ISE_BASE. Findings: 3 CRITICAL, 3 HIGH, 3 MEDIUM, 2 LOW. Critical items: default permit-all AuthZ rule, 14 non-compliant endpoints not quarantined, permit-all SGACL on IoT-to-Server cell.","artifacts":[]}}'

Markmap Visualization

Generate a policy hierarchy mind map for the audit report:

bash

python3 $MCP_CALL "node $MARKMAP_MCP_SCRIPT" markmap_customize '{"markdown_content":"# ISE Policy Audit\n## CRITICAL\n### Default AuthZ permits all\n### Non-compliant endpoints active\n### Permit-all SGACL\n## HIGH\n### 23% Unknown endpoints\n### SGT overlap (employees + contractors)\n### Shadowed AuthZ rules\n## MEDIUM\n### No posture reassessment\n### Long-lived sessions\n### MAB instead of 802.1X\n## LOW\n### Unused SGTs\n### Dead profiler profiles","theme":"dark"}'