Post tagged: networking

These aren't the packets I asked for

Since migrating a VM from qemu userspace networking to a dedicated IP and bridged networking I've been seeing abysmal throughput when downloading data from it. Instead of the usual 1.3MiB/s I get 30KiB/s tops. Taking a look with Wireshark a ton of retransmits of TCP segments appear …

VPN-in-a-box

Isolating the network interface provided by VPN software (like OpenVPN or tinc) may be a good idea if you intent to use it to isolate a program to that specific network.

This can somewhat be achieved using a separate user or group, iptables (to mark packets sent by that user …