Router does not more work under Lenny

Hello,

in my office and @customers I have installed a router which hold in the
same time there webpages and other public stuff. This was working since
Slink.

Now with Lenny it is gone...

The Web/FTP-Site, SSH and imap is working properly, but no one from the
internal network can access the Internet.

So, we have had a problem in Kehl with my 100 MBit Backbone (the house
burned down) I am provisory on a 2.2 Mbit Cable Modem to which I have
connected my Quad-Xeon which hold currently 23 Domains with over
120 VHosts. Put a second NIC in it, and booted "Production 1" which is
my old Etch system and it works perfectly.

Now I have bootstraped Lenny into "Production 2" installed Lilo and
rebooted... and can not more access the internet from my workstation..

----[ '/etc/network/interfaces' ]---------------------------------------
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp
hwaddress ether 00:90:27:85:92:44

auto eth1
iface eth1 inet static
hwaddress ether 00:10:4b:b0:83:7e
address 192.168.100.1
network 192.168.100.0
broadcast 192.168.100.255
netmask 255.255.255.0
------------------------------------------------------------------------

----[ command 'ifconfig' ]----------------------------------------------
eth0 Link encap:Ethernet Hardware Adresse 00:90:27:85:92:44
inet Adresse:91.89.223.82 Bcast:91.89.223.255 Maske:255.255.252.0
inet6-Adresse: fe80::290:27ff:fe85:9244/64 Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX packets:12970962 errors:0 dropped:0 overruns:0 frame:0
TX packets:784921 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:1000
RX bytes:1340416377 (1.2 GiB) TX bytes:163104621 (155.5 MiB)

eth1 Link encap:Ethernet Hardware Adresse 00:10:4b:b0:83:7e
inet Adresse:192.168.100.1 Bcast:192.168.100.255 Maske:255.255.255.0
inet6-Adresse: fe80::210:4bff:feb0:837e/64 Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX packets:49167 errors:0 dropped:0 overruns:0 frame:0
TX packets:32848 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:1607 Sendewarteschlangenlänge:1000
RX bytes:4198090 (4.0 MiB) TX bytes:37528059 (35.7 MiB)
Interrupt:17 Basisadresse:0x4000
------------------------------------------------------------------------

----[ command 'route -n' ]----------------------------------------------
Kernel-IP-Routentabelle
Ziel Router Genmask Flags Metric Ref Use Iface
192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
91.89.220.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0
0.0.0.0 91.89.220.1 0.0.0.0 UG 0 0 0 eth0
------------------------------------------------------------------------

----[ '/etc/dhcp3/dhcpd.conf' ]-----------------------------------------
ddns-update-style none;

option domain-name "tamay-dogan.net";
option domain-name-servers 82.212.63.118,85.216.127.134;

default-lease-time 43200;
max-lease-time 86400;

authoritative;

log-facility local7;

subnet 192.168.100.0 netmask 255.255.255.0 {
range 192.168.100.2 192.168.100.30;
option routers 192.168.100.1;
}
------------------------------------------------------------------------

----[ '/etc/sysctl.conf' ]----------------------------------------------
net.ipv4.conf.default.rp_filter=1
net.ipv4.conf.all.rp_filter=1

#net.ipv4.tcp_syncookies=1

net.ipv4.ip_forward=1

net.ipv6.conf.all.forwarding=1
------------------------------------------------------------------------

My workstation get an DHCP IP and I can access my Router/Server but not
the Internet. So, the config is exactly the same as under Sarge/Etch
but not more working.

What I have overseen here?

Thanks, Greetings and nice Day/Evening
Michelle Konzack
Systemadministrator
Tamay Dogan Network
Debian GNU/Linux Consultant

--
Linux-User #280138 with the Linux Counter, http://counter.li.org/
##################### Debian GNU/Linux Consultant #####################
<http://www.tamay-dogan.net/> Michelle Konzack
<http://www.can4linux.org/> Apt. 917
<http://www.flexray4linux.org/> 50, rue de Soultz
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