Site-to-Site & Remote Access with Strong Crypto, MFA, and Measurable SLOs
VPN (Virtual Private Network) creates encrypted tunnels for site-to-site connectivity and remote access—so data traverses untrusted networks safely and predictably.
SolveForce designs and operates VPNs that are identity-aware, MFA-enforced, high-availability, and evidence-rich—and we’ll tell you when ZTNA/SASE is the better fit for user access.
Nearby: 🔀 SD-WAN → /sd-wan • 🛡️ SASE → /sase • 🔐 ZTNA → /ztna
Keys & crypto: 🔑 Key Mgmt/HSM → /key-management • Encryption → /encryption
Evidence & ops: 📊 SIEM/SOAR → /siem-soar • 🖥️ NOC → /noc
🎯 Outcomes (Why SolveForce VPN)
- Confidentiality & integrity — strong ciphers, perfect-forward secrecy, policy as code.
- High availability — dual hubs, dual last-mile, automatic tunnel failover.
- Identity-aware remote access — SSO/MFA, device posture gates, split vs full tunnel by policy.
- Deterministic paths — hub-and-spoke or mesh with BGP/static; predictable routing to DC/Cloud.
- Audit-ready — tunnel SLOs, auth events, and change logs exported to SIEM.
🧭 Scope (What we deliver)
- Site-to-site: IPsec IKEv2 (preferred), DMVPN/GETVPN where appropriate, BGP or static routing.
- Remote access: TLS/SSL VPN (AnyConnect-style), IKEv2, or WireGuard with SSO/MFA and device posture.
- Cloud VPN: AWS/Azure/GCP VPN gateways, policy-based or route-based, Direct Connect/ExpressRoute/Interconnect integrations. → /direct-connect
- Head-ends & hubs: HA clusters (active/active or active/standby), geo-diverse POPs, global FQDN with health checks.
- Crypto posture: AES-GCM, ChaCha20-Poly1305 (where supported), SHA-256/384, ECDH P-256/384, PFS enabled.
When not VPN: For user/app access, prefer ZTNA/SASE (per-app, per-session, posture-aware). Keep VPN for site-to-site and specific remote workflows. → /ztna • /sase
🧱 Building blocks (Spelled out)
- IPsec IKEv2: route-based (VTI) with BGP; NAT-T; DPD; rekey timers aligned; PFS on.
- TLS/SSL VPN: mutual TLS, device certificates, posture checks; split/full tunnel policies.
- WireGuard: modern crypto & performance where supported; key rotation schedule; peer ACLs.
- Certificates/keys: PKI-issued certs, CMK/HSM custody, automated renewal. → /pki • /key-management
- Identity: SSO/MFA (Oidc/SAML/Radius), group-based policies; PAM for privileged access. → /iam • /pam
- Logging: auth events, tunnel up/down, bytes, routes, posture; forwarded to SIEM/SOAR. → /siem-soar
🧰 Design patterns
A) DC/Cloud Hub-and-Spoke (Most Common)
- Site tunnels (IPsec IKEv2) → dual hubs (colo or cloud) → BGP advertises prefixes; HA failover; QoS for voice/data.
B) Multicloud & Hybrid
- Route-based IPsec to AWS/Azure/GCP; BGP with Direct Connect/ExpressRoute/Interconnect hubs for deterministic latency. → /direct-connect
C) Remote Access with Posture
- TLS/SSL or IKEv2 client → SSO/MFA + device health (EDR/UEM) → split-tunnel for SaaS (SASE), full-tunnel for admin. → /sase • /mdm • /mdr-xdr
D) DMVPN/GETVPN Modernization
- Keep DMVPN/GETVPN where multicast/VRF needs remain; otherwise migrate to SD-WAN for app-aware routing. → /sd-wan
🔒 Security & Zero-Trust (Practical controls)
- Crypto: AES-GCM/ChaCha20-Poly1305; PFS; rekey < session lifetime; reject weak suites.
- Identity & posture: SSO/MFA; device certs; EDR/UEM health gates; jailbreak/root checks. → /iam • /mdm • /mdr-xdr
- Policy: default-deny; least-privilege routes; per-group split-tunnel; DNS & egress allow-lists.
- Boundary: ZTNA/SASE for user apps; VPN for site/control; WAF for web. → /waf
- Secrets: no static keys in configs; vault-issued; periodic rotation. → /secrets-management
📐 SLO guardrails (Targets you can measure)
| KPI / SLO | Target (Recommended) |
|---|---|
| Tunnel uptime (rolling 30d) | ≥ 99.9–99.99% (per tunnel) |
| Failover time (hub loss) | ≤ 30–60 s (BGP/DPD tuned) |
| Remote-access attach (p95) | ≤ 3–8 s (auth + tunnel up) |
| One-way latency budget (metro/reg.) | ≤ 2–5 ms / ≤ 15–35 ms route-dependent |
| Jitter (one-way) | ≤ 15% of latency |
| Packet loss (sustained) | < 0.1% |
| Evidence completeness | 100% (auth, routes, up/down, changes) |
SLO breaches trigger tickets and SOAR actions (reroute, rekey, scale, rollback). → /siem-soar
⚙️ Networking notes
- Routing: prefer route-based IPsec + BGP; avoid policy-only designs at scale.
- NAT-T & MSS: enable NAT-T; clamp MSS on tunnels to avoid fragmentation.
- QoS: mark EF for voice; steer via SD-WAN on loss/jitter thresholds.
- DNS: split-horizon; pin resolvers; protect with DNSSEC/DoH where policy allows.
- Cloud: propagate cloud prefixes carefully; avoid 0.0.0.0/0 unless policy requires.
📊 Observability & NOC
- Metrics: tunnel up/down, DPD/BFD, bytes, crypto errors, rekey count, latency/jitter/loss; auth & posture outcomes.
- Dashboards, anomaly alerts, and monthly reports; carrier/provider escalation trees.
→ /circuit-monitoring • /noc • /siem-soar
💵 Commercials
- Head-end licensing (conc. users/tunnels), hardware/VMs, HA pairs, geo hubs.
- Cloud gateway costs; Direct Connect/ExpressRoute ports if used.
- Support tiers, runbooks, and managed monitoring options.
🛠️ Implementation blueprint (No-surprise rollout)
1) Topology & SLOs — spokes, hubs, clouds; RTO/RPO and attach targets.
2) Crypto & keys — suites, lifetimes, rekey; CMK/HSM custody; PKI issuance. → /key-management • /pki
3) Identity & posture — SSO/MFA groups; EDR/UEM baselines; ZTNA for user apps. → /iam • /ztna • /mdm
4) Routing — route-based tunnels, BGP, prefix-lists, route-maps; failover tests.
5) Cloud — AWS/Azure/GCP VPNs; hub-and-spoke; private on-ramps. → /direct-connect
6) Observability — logs/metrics/traces to SIEM; runbooks in SOAR. → /siem-soar
7) Drills — hub loss, key rollover, prefix blackhole, mass re-auth; publish RCAs.
✅ Pre-engagement checklist
- 🗺️ Sites, clouds, prefixes, tenancy; desired hub locations.
- 🔐 Cipher/KDF policy; key custody (CMK/HSM), PKI.
- 👥 Remote-access groups, SSO/MFA, device posture (EDR/UEM).
- 🌐 Split vs full tunnel; DNS & egress policy.
- 🔀 SD-WAN interplay & thresholds; QoS classes.
- 📊 SIEM/SOAR export, dashboards, and escalation tree.
🔄 Where VPN Fits (Recursive View)
1) Grammar — encrypted paths in /connectivity.
2) Syntax — underlay to /cloud hubs and DCs.
3) Semantics — /cybersecurity preserves truth (identity, keys, logging).
4) Pragmatics — /solveforce-ai predicts risk, suggests rekeys/reroutes.
5) Foundation — coherent terms via /primacy-of-language.
6) Map — indexed in /solveforce-codex & /knowledge-hub.
📞 Design VPN That’s Fast, Safe & Auditable
Related pages:
/sd-wan • /sase • /ztna • /direct-connect • /key-management • /encryption • /pki • /siem-soar • /noc • /connectivity • /cloud • /cybersecurity • /knowledge-hub