F5 BIG-IP + Venafi Integration Guide

Why this guide matters: Almost nobody has written honestly about this integration from the practitioner side. Vendor docs show the happy path; this guide covers what actually happens in production.

Why Integrate F5 with Venafi?

The problem: Large enterprises have hundreds or thousands of SSL profiles across F5 devices. Managing certificates manually means:

Missed renewals → outages
Inconsistent configurations
No audit trail
Hours of repetitive work
Human error at scale

The solution: Venafi discovers certificates on F5, tracks expiration, automates renewal, and pushes new certs—without touching the load balancer manually.

Without Integration	With Integration
Manual cert tracking	Automated discovery
Spreadsheet inventory	Real-time dashboard
Renewal tickets	Automated provisioning
Config drift	Enforced standards
Audit scrambles	Continuous compliance

Integration Architecture

┌─────────────────┐     ┌──────────────────────┐     ┌─────────────────┐
│                 │     │                      │     │                 │
│   F5 BIG-IP     │◄───►│  Venafi TPP/TLS-PD   │◄───►│  Certificate    │
│   (Target)      │     │  (Orchestrator)      │     │  Authority      │
│                 │     │                      │     │                 │
└─────────────────┘     └──────────────────────┘     └─────────────────┘
        ▲                         │
        │                         │
        └─────────────────────────┘
          iControl REST API

Venafi → F5 Communication

Uses F5 iControl REST API
Requires F5 credentials stored in Venafi
Can discover, provision, and manage certificates

Integration Points

Discovery - Find all certs on F5
Provisioning - Push new/renewed certs to F5
Installation - Create/update SSL profiles
Validation - Verify successful deployment

Prerequisites Checklist

F5 Side

iControl REST API enabled
Service account created for Venafi
Service account has appropriate role (Administrator or custom role with cert management)
Network connectivity from Venafi to F5 management interface
F5 version compatibility confirmed (BIG-IP 11.5+)

Venafi Side

F5 BIG-IP driver/adapter installed
Appropriate license for F5 integration
Policy folder structure planned
CA templates configured

Network

Firewall rules: Venafi → F5 management IP (port 443)
DNS resolution working both directions
Certificates for Venafi-to-F5 communication trusted

F5 Service Account Setup

Option A: Administrator Role (Simple but Broad)

# tmsh commands on F5
create auth user venafi-svc password <secure-password> partition-access add { all-partitions { role admin } }

Pros: Works immediately, full access

Cons: Over-privileged, fails security reviews

Option B: Custom Role (Recommended for Production)

Create a role with minimum required permissions:

# Create custom role
create auth role venafi-cert-manager {
    description "Venafi certificate management"
    permissions {
        ssl-cert { all }
        ssl-key { all }
        ssl-profile { all }
        ltm-virtual { read }
    }
}

# Create user with custom role
create auth user venafi-svc password <secure-password> partition-access add { all-partitions { role venafi-cert-manager } }

Resource	Access	Why
ssl-cert	read/write	Manage certificates
ssl-key	read/write	Manage private keys
ssl-profile	read/write	Update SSL profiles
ltm-virtual	read	Discover virtual servers

Venafi Adapter Configuration

Installing the F5 Adapter

The F5 BIG-IP adapter (driver) typically comes bundled with Venafi TPP or can be installed separately.

Location in TPP:

Platforms → BIG-IP → Drivers

Setting	Description	Example
Host	F5 management IP/hostname	bigip01.corp.local
Port	iControl REST port	443
Username	Service account	venafi-svc
Password	Stored in credential vault	********
Validate Certificate	Verify F5's management cert	Yes (recommended)

Device Object in Venafi

Policy Folder
└── Network Devices
    └── Load Balancers
        └── bigip01.corp.local (BIG-IP device)

Discovery Configuration

Discovery finds existing certificates on your F5 devices.

What Gets Discovered

Certificates in /Common/ and other partitions
Certificate-key associations
SSL profiles using each certificate
Virtual servers using each profile
Expiration dates

Discovery Job Setup

Create discovery job targeting F5 device(s)
Specify partitions to scan (or all)
Set schedule (daily recommended)
Configure what to do with discovered certs:
- Import to inventory only
- Import and bring under management
- Alert on unknown certificates

Common discovery finding: Certificates you didn't know existed. This is the point—visibility first.

Provisioning Workflow

Once certificates are under Venafi management, the provisioning workflow handles renewals.

Workflow Steps

1. Certificate approaching expiration (e.g., 30 days)
         ↓
2. Venafi requests new certificate from CA
         ↓
3. CA issues certificate
         ↓
4. Venafi stores cert + key
         ↓
5. Venafi pushes to F5 via iControl REST
         ↓
6. F5 SSL profile updated with new cert
         ↓
7. Venafi validates deployment
         ↓
8. Old certificate archived/removed

Push to Existing SSL Profile

Updates certificate in-place
Virtual servers continue using same profile
Zero-downtime renewal

Create New SSL Profile

New profile with date-stamped name
Requires virtual server reconfiguration
Better for blue/green deployments

Recommended: Push to existing profile for most use cases.

SSL Profile Binding

The integration can manage SSL profile configuration, not just certificate content.

What Can Be Automated

Certificate assignment to profile
Key assignment
Chain/intermediate certificate
Profile settings (with caution)

What You Should Control Manually

Cipher suite configuration
Protocol versions
Client certificate settings (mTLS)
Session settings

Best practice: Let Venafi manage certificate lifecycle. Keep security configuration in your F5 change management process.

Multi-Partition Environments

Enterprise F5 deployments often use partitions for multi-tenancy.

/Common/        ← Shared resources, be careful
/Partition-A/   ← Team A's certificates
/Partition-B/   ← Team B's certificates

Service Account Scope

Grant access only to partitions Venafi should manage
/Common/ often contains shared certs—coordinate carefully
Different credentials for different partitions (if needed)

Policy Mapping

Map Venafi policy folders to F5 partitions
Different approval workflows per partition
Separate inventory views per team

High Availability & Device Groups

F5 HA pairs and device groups require special consideration.

Scenario 1: Sync-Failover (Active/Standby)

Push certificate to active unit. Config sync propagates to standby. Venafi only needs to target active device.

Scenario 2: Sync-Only (Active/Active)

Push to one device. Sync propagates. OR push to both independently.

Scenario 3: No Sync (Standalone Pairs)

Must push to each device separately. Configure both as separate devices in Venafi.

Recommendation: Target the active device. Let F5's native sync handle propagation. Verify sync status after provisioning.

Common Integration Challenges

"Certificate installed but SSL profile not updated"

Cause: Certificate pushed to F5 but not bound to profile.

Fix: Check Venafi application object configuration. Verify profile binding settings. May need to manually associate first time.

"Discovery finds certificates but can't manage them"

Cause: Certificates were created outside Venafi workflow.

Fix: Import discovered certs to appropriate policy folder. Re-enroll through Venafi CA workflow. Or mark as "externally managed" if intentional.

"Provisioning fails with 401 Unauthorized"

Cause: Credential issues.

Fix: Verify F5 service account not locked/expired. Check password hasn't changed. Confirm role permissions haven't been modified.

curl -k -u venafi-svc:password https://bigip01/mgmt/tm/sys/version

"Sync issues in HA pair after cert push"

Cause: Config sync not triggered or failed.

Fix: Check sync status. Trigger manual sync if needed. Verify both devices show same cert thumbprint.

tmsh show cm sync-status

Operational Best Practices

Staged Rollout

Phase 1: Discovery only (read-only, build inventory)
Phase 2: Manual provisioning (human approval for each push)
Phase 3: Semi-automated (auto-renew, human approval for push)
Phase 4: Fully automated (end-to-end, alerting only)

Don't skip phases. Build confidence gradually.

Monitoring and Alerting

Configure alerts for:

Provisioning failures
Discovery finding unknown certificates
Certificates expiring within 14 days (failsafe)
F5 connectivity issues

Change Windows

Configure Venafi to only push during approved times
Or use approval workflows for production F5s
Development/test can be fully automated

Security Considerations

Credential Storage

Use Venafi's credential vault
Rotate F5 service account password periodically
Monitor for credential access anomalies

API Security

Enable audit logging on F5 for REST API calls
Consider IP restrictions on service account
Use certificate authentication if supported

Network Segmentation

Venafi → F5 management network access
Don't expose F5 management broadly
Consider jump hosts for cross-zone access

Troubleshooting Checklist

When things go wrong:

Can Venafi reach F5 management IP? (ping, telnet 443)
Is F5 iControl REST responding? (curl test)
Is service account valid? (test login via GUI)
Does service account have correct role?
Is target partition correct?
Are there F5 config sync issues?
Check Venafi adapter logs for errors
Check F5 /var/log/restjavad.0.log for API errors

Frequently Asked Questions

Need the F5 Certificate Checklist?

Our operational checklist covers everything for F5 certificate management.

View Checklist

F5 BIG-IP + Venafi Integration