On Ubuntu 8.04 (at least), you can set this per route via something like: ip route change default via x.x.x.x dev eth0 initcwnd 6 but please test thoroughly i

On Ubuntu 8.04 (at least), you can set this per route via something like: ip route change default via x.x.x.x dev eth0 initcwnd 6 but please test thoroughly if trying this.