L2 TunnelHardwareConnector
The Sefthy Connector: inside the NanoPi R3S LTS
Why we picked a NanoPi R3S LTS in a CNC case. SoC, real throughput, out-of-band management and why a mini-PC was the wrong call.
2 min read
Tag
L2 Tunnel
10 articles
L2 TunnelDNS
Failover without touching DNS: the L2 dividend
Flipping DNS records under stress is the worst part of L3 DR. With an L2 tunnel you skip it entirely because the IP does not change.
2 min read
L2 TunnelLegacy
L2 and legacy apps: a lifeline for 2005-era ERPs
Legacy apps with hard-coded IPs are the main obstacle to clean DR. An L2 tunnel makes them recoverable without rewriting them.
2 min read
L2 TunnelDisaster RecoveryPillar
L2 tunnels for Disaster Recovery: the complete guide
What a Layer-2 tunnel is, why in DR it matters more than anything else and how this single architectural choice separates a 4-minute RTO from a 4-hour one.
4 min read
L2 TunnelMulti-sito
Multi-site L2 tunnels: extending several LANs into the same cloud
One head office, two branches, one shared DR cloud. How to do it with the Connector without creating IP collisions.
2 min read
L2 TunnelSicurezza
L2 tunnels: security and encryption deep dive
Encryption, tenant isolation, mutual auth: what makes an enterprise-grade L2 tunnel actually secure and the questions to ask vendors.
2 min read
L2 TunnelPerformance
L2-to-cloud latency: real-world numbers
Real Connector ↔ Sefthy datacentre latency in three setups: fibre, FTTH 2.5G, 5G. What works and what does not.
1 min read
L2 TunnelNetworking
Layer 2 vs Layer 3 in DR: practical differences
Layer 3 DR is the historical default, but it brings NAT, DNS reconfiguration and site-to-site VPN. Layer 2 eliminates roughly 70% of that work.
1 min read
L2 TunnelIP
Same IP in the cloud: how it actually works
A technical walkthrough (with ARP captures) showing how a Sefthy Connector extends the customer subnet into the Sefthy cloud while preserving original IPs.
2 min read
L2 TunnelVPN
Site-to-site VPN vs L2 tunnel: what changes for DR
A site-to-site VPN routes packets between different subnets. An L2 tunnel extends the same subnet. The difference only shows up when something breaks.
2 min read