Why doesn't SpeedTest.net Upload work in Windows when using a Debian-router?

1

There is a FTTx connection. I connect ISP cable to the WindowsXP pc, setup PPPoE. SpeedTest.net shows normal Upload / Download.

Now I connect ISP cable to router with Debian 7.5 installed, set up network interfaces, routing. Second router interface is connected to LAN. SpeedTest.net on Linux Mint17 machine shows normal Upload/Download. On WindowsXP and Windows7 machines Download is normal, but Upload becomes idle after working for some milliseconds.

Why? How can I provide normal Upload on Windows machines?

eth0 connected to LAN XXX.XXX.XXX.0

eth1 connected to ISP

External IP: YYY.YYY.YYY.YYY

Configs:

/etc/network/interfaces

auto lo
iface lo inet loopback

allow-auto eth0
allow-hotplug eth0
iface eth0 inet static
        address XXX.XXX.XXX.11
        netmask 255.255.255.0
        network XXX.XXX.XXX.0
        broadcast 192.168.100.255
        gateway XXX.XXX.XXX.1
        dns-nameservers DNS.DNS.DNS.DNS

allow-auto eth1
allow-hotplug eth1
iface eth1 inet manual

allow-auto ppp1
iface ppp1 inet ppp
        provider dsl-provider
        pre-up /etc/network/if-pre-up

/etc/ppp/peers/dsl-provider

unit 1

user *user*
pty "/usr/sbin/pppoe -I eth1 -T 80 -m 1452"

noipdefault
usepeerdns
defaultroute
replacedefaultroute

holdoff 15
maxfail 0
lcp-echo-interval 20
lcp-echo-failure 3

connect /bin/true
hide-password
noauth
persist
mtu 1492
mru 1492

noaccomp
default-asyncmap

/etc/network/if-pre-up

iptables -F
iptables -t nat -F
iptables -t mangle -F

iptables -A FORWARD -i eth0 -o ppp1 -s XXX.XXX.XXX.0/24 -j ACCEPT
iptables -A FORWARD -i ppp1 -o eth0 -d XXX.XXX.XXX.0/24 -j ACCEPT
iptables -P FORWARD DROP

iptables -A POSTROUTING -t nat -s XXX.XXX.XXX.111 -o ppp1 -j SNAT --to-source YYY.YYY.YYY.YYY

alxdon.rs

Posted 2014-07-18T16:59:32.360

Reputation:

Answers

2

I answer to myself and everyone interested. The Problem is nown as Path MTU Discovery Black Hole. Problem can be solved in different ways, I have just changed in /etc/ppp/peers/dsl-provider

pty "/usr/sbin/pppoe -I eth1 -T 80 -m 1412"

user347931

Posted 2014-07-18T16:59:32.360

Reputation: 21