Intermediate Estimated time: 6 min Category: Networking Published

Visión general

When you need advanced routing, firewalling and network services in virtual form, the most common options are OPNsense, pfSense, MikroTik CHR and VyOS.

This document summarizes the key differences and helps you choose according to the scenario.

Platform guides¶

Typical use cases¶

Networking and cybersecurity labs
Virtual routers in a home lab or at the perimeter
Perimeter firewall in on-prem infrastructure
Static and dynamic BGP/OSPF in hybrid environments
Site-to-site VPN and remote access

Quick comparison¶

Solution	Technology base	Strengths	Limitations	Recommended scenario
OPNsense	FreeBSD + pf	Modern interface, good plugin ecosystem, frequent updates	Less historical documentation than pfSense	Home lab, SMB, security-focused perimeter
pfSense	FreeBSD + pf	Very stable, large community, high operational maturity	Licensing/ecosystem changes depending on edition	Traditional production and established environments
MikroTik CHR	RouterOS	High performance per cost, very broad routing features	RouterOS learning curve, performance-based licence	ISP/WISP, intensive L3 routing, operator labs
VyOS	Linux + FRR + nftables/iptables	Declarative CLI, strong in IaC automation and advanced routing	Less friendly for those who prefer a full graphical interface	Automation, BGP/OSPF, virtual backbone

Advanced technical matrix¶

Criterion	OPNsense	pfSense	MikroTik CHR	VyOS
Management plane	Web interface + limited CLI	Web interface + shell	WinBox/WebFig interface + RouterOS CLI	Declarative CLI + API/automation
Dynamic routing (BGP/OSPF)	Supported (plugins/FRR)	Supported (FRR package)	Very robust in RouterOS	Very robust with native FRR
Main focus	Modern firewall/UTM	Stable, mature firewall	High-performance routing	Routing + automation as code
Usual VPN	IPsec, OpenVPN, WireGuard	IPsec, OpenVPN, WireGuard	IPsec, WireGuard, legacy L2TP/PPTP	IPsec, OpenVPN, WireGuard
High availability	CARP/failover and configuration sync	CARP/failover and configuration sync	VRRP/failover depending on design	VRRP/high availability depending on architecture
Learning curve	Low-medium	Low-medium	Medium-high	Medium-high
Automation	Medium (API/plugins)	Medium (API/configuration backup)	High (scripts/Ansible/RouterOS API)	High (GitOps + CLI templates)
Recommended profile	SMB, secure perimeter, home lab	Classic, conservative production	ISP/WISP and operator labs	Network and security automation environments

Performance targets (initial lab)¶

KPI	Baseline target	How to measure it	Acceptance criterion
L3 throughput (unencrypted)	>= 1 Gbps sustained	`iperf3` TCP/UDP between segments	Variation < 15% across 3 runs
Site-to-site VPN throughput	>= 300 Mbps sustained	`iperf3` through the tunnel	Average CPU usage < 80%
Intra-site latency	<= 5 ms added	Baseline `ping` vs with vRouter	Stable delta without abnormal spikes
Packet loss	<= 0.5%	Controlled `mtr`/`ping -f`	No sustained loss > 1 minute
Failover convergence	<= 30 s	Controlled link/neighbour cut	Recovery without manual intervention
Session stability	0 unplanned restarts	24-72 h monitoring	No control-plane outage

Notes:

Run tests at off-peak and peak hours to detect degradation under load.
Keep the same packet size and parallelism when comparing platforms.
Repeat tests after version, driver or hypervisor type changes.
If you need targets per context (home lab, SMB, ISP/WISP), use the vRouter performance test template.

Minimum uniform hardening (all platforms)¶

Change default credentials and remove unneeded users.
Restrict administrative access by IP/dedicated management network.
Enable MFA for the GUI/admin portal when available.
Disable unused management services (SSH, API, public GUI).
Apply a deny by default policy on the WAN and explicit rules per service.
Separate management, user and server networks (VLANs/zones).
Enable security logs and send them to a central collector.
Configure reliable NTP for event traceability and auditing.
Encrypt and validate configuration backups; test restoring them periodically.
Define a patching process with a maintenance window and a rollback plan.

What to choose by priority¶

flowchart TD
    A[What do you prioritize?] --> B{Main interface}

    B -->|GUI| C{Profile?}
    B -->|CLI + IaC| D[VyOS]

    C -->|Modern firewall + plugins| E[OPNsense]
    C -->|Traditional stability| F[pfSense]
    C -->|Aggressive routing + cost| G[MikroTik CHR]

    E --> H[Home lab / SMB / perimeter]
    F --> I[Classic production]
    G --> J[ISP / WISP / operator lab]
    D --> K[Automation and BGP]

    style E fill:#4caf50,color:#ffffff
    style F fill:#1e88e5,color:#ffffff
    style G fill:#f57c00,color:#ffffff
    style D fill:#8e24aa,color:#ffffff

Key technical criteria¶

1) Dynamic routing¶

VyOS and MikroTik CHR stand out in BGP/OSPF for complex topologies.
OPNsense/pfSense cover dynamic routing, but tend to shine more as firewalls/UTM.

2) Day-to-day operation¶

If you prefer a full GUI, OPNsense/pfSense reduce friction.
If you prioritize GitOps/automation, VyOS fits better thanks to its declarative CLI model.

3) VPN and remote access¶

All of them support site-to-site VPN and remote access (IPsec/WireGuard/OpenVPN depending on version and packages).
Check exact compatibility per version before standardizing in production.

4) Licensing and support¶

Always review the current edition/commercial model to avoid surprises on upgrades.
In critical environments, validate enterprise support or a local partner.

Practical recommendations¶

Start with a proof of concept using realistic traffic (north-south and east-west).
Define key indicators (KPIs): latency, throughput, failover, recovery time.
Document configuration backup/restore and the rollback procedure.
Version the configuration (where possible) to audit changes.
Close each evaluation with a short executive report (risks, 7/30-day actions and final decision).

Decision checklist¶

Do you need a GUI or a declarative CLI?
Is the priority firewalling, advanced routing or both?
How many VPN tunnels and BGP peers will you maintain?
What operational capacity does the networking and security team have?
Are there commercial support and SLA requirements?

If you are torn between two options, compare both in the same lab for a week and decide on metrics, not personal preference.