I found the problem my self, it wasn't the NAT, it was the 10Mbit Card. This card was defect. Now NAT works just great! -Stefan Mueller > 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) -- Open WebMail Project (http://openwebmail.org)
