> > > > > > Hi! > > > > > > > > > > > > My configuration: > > > > > > ================= > > > > > > > > > > > > O-------------o O-----------------------o > > > > > > | WinXP | | eth0 | eth1 | > > > > > > | 10.10.1.100 |----| 10.10.1.254 | D H C P |----INTERNET > > > > > > | | | | | > > > > > > O-------------o O-----------------------o > > > > > > My Computer My NAT-Computer > > > > > > > > > > > > NAT-Computer: > > > > > > Linux 2.4.20-4GB > > > > > > load average: 0.08, 0.05, 0.06 > > > > > > iptables v1.2.7a > > > > > > All the NICs I use are 3com 3C905-TX > > > > > > > > > > > > When I do some bandwidth tests on the NAT-Computer > > > > > (provider's service > > > > > > page) my bandwidth is about 1MBit/second When I do the > > > same on my > > > > > > computer I only get about 100kbit/second > > > > > > > > > > > > Now I wonder if there are any problems with my > configuration...? > > > > > > Would be nice if you could help me... > > > > > > > > > > > > Thanks in advance > > > > > > Florian St. > > > > > > > > > > > > Root(AT)scheuchenstuel(DOT)com > > > > > > > > > > > > > > > > > > My iptables-configuration: > > > > > > ========================== > > > > > > > > > > > > > > > > > > > > > #################################################################### > > > > > ## > > > > > > ###### > > > > > > ###### > > > > > > > > > > > > #!/bin/bash > > > > > > # > > > > > > > > > > > > modprobe iptable_nat > > > > > > echo 1 > /proc/sys/net/ipv4/ip_forward > > > > > > > > > > > > ########## CLEARING TABLES > > > > > > iptables -F > > > > > > iptables -t nat -F > > > > > > iptables -t mangle -F > > > > > > iptables -X > > > > > > > > > > > > ########## SETTING POLICIES > > > > > > iptables -P INPUT DROP > > > > > > iptables -P OUTPUT ACCEPT > > > > > > iptables -P FORWARD DROP > > > > > > > > > > > > ########## NAT > > > > > > iptables -A INPUT -i eth1 -m state --state > > > ESTABLISHED,RELATED -j > > > > > > ACCEPT iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE > > > > > > > > > > > > ########## LOOPBACK SETTINGS > > > > > > iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -s > > > > > > 127.0.0.1/32 -j ACCEPT > > > > > > > > > > > > ########## EXTERNAL OPEN PORTS iptables -A INPUT -i eth1 -p > > > > > > tcp --dport 80 -j ACCEPT > > > > > > > > > > > > ########## INTERNAL OPEN PORTS iptables -A INPUT -s > > > > > > 10.10.1.100/32 -j ACCEPT > > > > > > > > > > > > ######### NAT FORWARDING > > > > > > iptables -A FORWARD -s 10.10.1.100/32 -j ACCEPT iptables -A > > > > > FORWARD -d > > > > > > 10.10.1.100/32 -j ACCEPT > > > > > > > > > > > > > > > > > > > > > #################################################################### > > > > > ## > > > > > > ###### > > > > > > ###### > > > > > > > > > > The rules look a little unusual; in fact, they look downright > > > > > dangerous. You may want to read a good iptables > tutorial such > > > > > as the one by Oskar Andreasson. You can find a link to it on > > > > > the netfilter.org web site. You can also find some slide > > > shows in the > > > > > training section at http://iscs.sourceforge.net > > > > > > > > > > However, I do not think your rules would create a > > > throughput problem. > > > > > How are you measuring your throughput? > > > > > -- > > > > > John A. Sullivan III > > > > > Chief Technology Officer > > > > > Nexus Management > > > > > +1 207-985-7880 > > > > > john.sullivan@xxxxxxxxxxxxx > > > > > --- > > > > > > > > Now i tried to use a script suggested by Oskar Andreasson > > > > > > > > http://iptables-tutorial.frozentux.net/iptables-tutorial.html#RCFIRE > > > WA > > > > LLTXT > > > > > > > > But the problem is still the same... > > > > I think there is another problem... > > > > > > > > When i configure&start squid on the NAT-Computer i have > > > full bandwidth... > > > > > > > > I don't know what to do anymore... > > > > > > > > Thanks in advance > > > > Florian St. > > > How are you measuring your throughput? What happens if > you don't use > > > squid but allow direct (iptables protected) web access from the > > > client? > > > -- > > > John A. Sullivan III > > > Chief Technology Officer > > > Nexus Management > > > +1 207-985-7880 > > > john.sullivan@xxxxxxxxxxxxx > > > --- > > > > I use the bandwidth test-page of my provider... > > http://performance.chello.at:81 > > > > What do you mean with "direct" web access ? > > Web access via NAT ? > > I have entered the NAT-computer's IP as default gateway and the > > provider's DNS-servers as DNS-servers on my PC. > > I think this is what you mean with direct access... > > > > With this direct access i only get about 100kbit, when i > use squid or > > when i do the tests on the NAT-computer i have full > Bandwidth (around > > 1MBit/sec) > > > > I think there is a general problem with my configuration, > because the > > bandwidth is no better with iptables-scripts which are > known to work > > fine... > > > > I really don't know what to do anymore... > > > > Thanks in advance > > Florian St. > > As I look at it, unless you have significantly altered your > scripts, you are probably not using Squid. I see no rule to > redirect your web traffic to Squid. What happens if you > disable Squid? > > -- > John A. Sullivan III > Chief Technology Officer > Nexus Management > +1 207-985-7880 > john.sullivan@xxxxxxxxxxxxx > Oh no - i never wanted a transparent proxy. I only activated squid to check is there is a general problem with the configuration of my NICs To test this I entered the NAT-Computer's IP-address as proxy-address in my browser When I'm surfing with using the proxy - everything is fine - i have around 1MBit/sec When I access the internet directly (no proxy --> NAT) the speed is only about 100kBit/sec Thanks in advance Florian St.
