> How can I tell the TCP stack for the PPP interface that media for the > PPP connection is SLOW (because the primary TCP times out often) but > LOSSLESS (since it *is* a TCP conection which guarrantees delivery), *so > that the PPP TCP stack prevents timeouts and never resends a packet* ?! You can't. Your VPN is broken by design. either switch to UDP as the carrier or use L3 proxying: a transparent proxy that speaks a non TCP protocol without retransmits and sits at the entry point and another at the exit point that speaks real TCP again (this seem to be the tricks used by wireless networks which have similar problems) Using UDP is better because it'll work for non TCP protocols. -Andi - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html