Linux Point-to-Point Networking Consulting
Expert configuration, optimization, and troubleshooting of Linux point-to-point networking — IPsec (strongSwan/Libreswan), WireGuard, OpenVPN, GRE, L2TP/IPsec, PPPoE, BGP/OSPF routing, and secure site-to-site VPNs for enterprise, data center, and branch office connectivity.
Get Point-to-Point ExpertiseOur Linux Point-to-Point Services
Zwiegnet specializes in building reliable, high-performance, and secure point-to-point links on Linux — from branch office VPNs to data center interconnects, cloud hybrid connections, and remote access solutions. We handle modern protocols like WireGuard and IPsec IKEv2, legacy setups (PPPoE, L2TP), and advanced routing for complex networks.
Our point-to-point networking expertise includes:
- WireGuard VPN – Lightning-fast, modern, minimalistic VPN; full setup, key management, roaming support, firewall integration, and performance tuning for site-to-site and road warrior use cases.
- IPsec (strongSwan & Libreswan) – IKEv1/IKEv2, X.509 certificates, PSK, EAP, route-based vs policy-based tunnels, MOBIKE, Dead Peer Detection, and high-availability clustering.
- OpenVPN – TLS-based VPNs, TCP/UDP modes, client-server & site-to-site, compression, multi-factor authentication, and integration with LDAP/RADIUS/Kerberos.
- GRE & IP-in-IP Tunnels – Simple, lightweight encapsulation for routing protocols (BGP/OSPF), multicast, or legacy applications; combined with IPsec for encryption.
- L2TP/IPsec & PPPoE – Legacy client access (L2TP for Windows/macOS/iOS), PPPoE for DSL/FTTx providers, and bridging/transparent tunneling.
- Dynamic Routing Over Tunnels – BGP (FRR/Bird), OSPF, RIPng, and route redistribution across IPsec/WireGuard/GRE tunnels for dynamic failover and redundancy.
- High Availability & Failover – Keepalived/VRRP, conntrackd for state sync, multiple tunnels with failover, and automated monitoring/alerting.
- Security Hardening – Firewall rules (nftables/iptables), NAT traversal, certificate revocation (CRL/OCSP), perfect forward secrecy, and protection against replay/DoS attacks.
- Troubleshooting & Performance – Packet capture (tcpdump/Wireshark), IKE debug logs, MTU/fragmentation issues, throughput testing (iperf3), and latency optimization.
Ideal for: branch-to-headquarters VPNs, cloud hybrid connectivity (AWS/Azure/GCP), remote worker access, data center interconnects, service providers, and any organization needing secure, high-performance site-to-site or remote point-to-point links on Linux.
Located between Madison and Milwaukee, Wisconsin since 2009 — direct access to networking specialists with deep experience in Linux-based VPN and tunnel technologies.