Hello i have a performance problem with my new SNAT (masquerade). i have a cable modem with 512kbit/s. downloading a 1MB file takes 30s without NAT. downloading the same file from a pc behind NAT takes 500s! (2.5kbit/s) OK, some information: the NAT Router: -AMD 1800+ -512MB DDR-Ram -10MBit Card to the Cablemodem (the cabelmodem has a 10Mbit connector) -100MBit to the Intranet -Redhat 8.0 (2.4.18-14) -iptables v1.2.6a -load average 0.00 0.00 0.00 -no entrys in /var/log/messages -iptables -L -> nothing,policy ACCEPT in INPUT OUTPUT FORWARD -using iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE -interfaces: eth0 217.162.74.155 mask 255.255.254.0 (dhcp) eth1 10.22.0.1 mask 255.255.0.0 -routing table: 217.162.74.0 * 255.255.254.0 U 0 0 0 eth0 10.22.0.0 * 255.255.0.0 U 0 0 0 eth1 127.0.0.0 * 255.0.0.0 U 0 0 0 lo default (isp's router) 0.0.0.0 UG 0 0 0 eth0 the Client -AMD 1800+ -512MB DDR-Ram -100MBit to the Intranet -Redhat 8.0 (2.4.18-14) -load average 0.00 0.00 0.00 -iptables v1.2.6a -no entrys in /var/log/messages -iptables entrys -interfaces: eth0 10.22.32.1 mask 255.255.0.0 -routing table: 10.22.0.0 * 255.255.0.0 U 0 0 0 eth0 127.0.0.0 * 255.0.0.0 U 0 0 0 lo default 10.22.0.1 0.0.0.0 UG 0 0 0 eth0 transmission between server and client has normal 100Mbit speed. ping from the client to the internet is normal at ~100ms what did i wrong? i know that NAT can't be as fast as a direct connection but this is terrible slow... -- Open WebMail Project (http://openwebmail.org)
