Arch Linux

dcfighter

Member

Registered: 2008-08-11

Posts: 23

Internet sharing - slow http.

My Arch box is connected to the net by ADSL usb modem and I share it with windows-powered computer like this:

eth0      Link encap:Ethernet  HWaddr 00:30:4F:41:1E:ED
          inet addr:192.168.0.1  Bcast:192.168.0.1  Mask:255.255.255.0
          inet6 addr: fe80::230:4fff:fe41:1eed/64 Scope:Link
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:161 errors:0 dropped:0 overruns:0 frame:0
          TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16176 (15.7 Kb)  TX bytes:528 (528.0 b)
          Interrupt:18 Base address:0xef00

and the script I run is:

echo 1 > /proc/sys/net/ipv4/ip_forward


iptables -F -t nat
iptables -X -t nat
iptables -F -t filter
iptables -X -t filter


iptables -t filter -P FORWARD DROP


iptables -t filter -A FORWARD -s 192.168.0.1/255.255.255.0 -d 0/0 -j ACCEPT
iptables -t filter -A FORWARD -s 0/0 -d 192.168.0.1/255.255.255.0 -j ACCEPT




iptables -t nat -A POSTROUTING -s 192.168.0.0/16 -d 0/0 -j MASQUERADE


iptables -I FORWARD -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu

The other system (the one with WIndows) can acces the internet (ip: 192.168.0.2 mask 255.255.255.0 gateway 192.168.0.1), it can download stuff at maximal speed but somehow internet browsing is really slow (either on IE or FireFox). Loading of google.com takes ~25 secs.