Мрежовите ми карти не искат да пингват собствените си ИП
адреси. Настроих ги по следния начин:
 ifconfig eth0 10.10.10.1 broadcast 10.255.255.255 netmask
255.255.255.0
 ifconfig eth1 192.168.0.1 broadcast 192.255.255.255 netmask
255.255.255.0
 И преди съм ги конфигурирал по същия начин без проблеми, но
след като си преинсталирах Линукс-а вече не искат да бачкат.

Хахахаха, не така бре, омазал си нещата ... :
ifconfig eth0 10.10.10.1 broadcast 10.10.10.255 netmask
255.255.255.0
 ifconfig eth1 192.168.0.1 broadcast 192.168.0.255 netmask
255.255.255.0

 Пламен-е, пробвах и по твоя начин, обаче пак не се пингват.
Направо ще се побъркам :)

iptables-save какво дава

root@dellhostname:~# iptables-save
 # Generated by iptables-save v1.3.3 on Mon Feb  6 22:52:49
2006
*filter
:INPUT ACCEPT [1384:210344]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [941:83982]
-A FORWARD -s 192.168.0.2 -j ACCEPT
-A FORWARD -d 192.168.0.2 -j ACCEPT
-A FORWARD -s 192.168.0.3 -j ACCEPT
-A FORWARD -d 192.168.0.3 -j ACCEPT
-A FORWARD -s 192.168.0.4 -j ACCEPT
-A FORWARD -d 192.168.0.4 -j ACCEPT
-A FORWARD -s 192.168.0.5 -j ACCEPT
-A FORWARD -d 192.168.0.5 -j ACCEPT
-A FORWARD -s 192.168.0.6 -j ACCEPT
-A FORWARD -d 192.168.0.6 -j ACCEPT
-A FORWARD -s 192.168.0.7 -j ACCEPT
-A FORWARD -d 192.168.0.7 -j ACCEPT
-A FORWARD -s 192.168.0.8 -j ACCEPT
-A FORWARD -d 192.168.0.8 -j ACCEPT
-A FORWARD -s 192.168.0.9 -j ACCEPT
-A FORWARD -d 192.168.0.9 -j ACCEPT
-A FORWARD -s 192.168.0.10 -j ACCEPT
-A FORWARD -d 192.168.0.10 -j ACCEPT
-A FORWARD -s 192.168.0.11 -j ACCEPT
-A FORWARD -d 192.168.0.11 -j ACCEPT
-A FORWARD -s 192.168.0.12 -j ACCEPT
-A FORWARD -d 192.168.0.12 -j ACCEPT
-A FORWARD -s 192.168.0.13 -j ACCEPT
-A FORWARD -d 192.168.0.13 -j ACCEPT
-A FORWARD -s 192.168.0.14 -j ACCEPT
-A FORWARD -d 192.168.0.14 -j ACCEPT
-A FORWARD -s 192.168.0.15 -j ACCEPT
-A FORWARD -d 192.168.0.15 -j ACCEPT
-A FORWARD -s 192.168.0.16 -j ACCEPT
-A FORWARD -d 192.168.0.16 -j ACCEPT
-A FORWARD -s 192.168.0.17 -j ACCEPT
-A FORWARD -d 192.168.0.17 -j ACCEPT
-A FORWARD -s 192.168.0.18 -j ACCEPT
-A FORWARD -d 192.168.0.18 -j ACCEPT
-A FORWARD -s 192.168.0.19 -j ACCEPT
-A FORWARD -d 192.168.0.19 -j ACCEPT
-A FORWARD -s 192.168.0.20 -j ACCEPT
-A FORWARD -d 192.168.0.20 -j ACCEPT
-A FORWARD -s 192.168.0.21 -j ACCEPT
-A FORWARD -d 192.168.0.21 -j ACCEPT
-A FORWARD -s 192.168.0.22 -j ACCEPT
-A FORWARD -d 192.168.0.22 -j ACCEPT
-A FORWARD -s 192.168.0.23 -j ACCEPT
-A FORWARD -d 192.168.0.23 -j ACCEPT
-A FORWARD -s 192.168.0.24 -j ACCEPT
-A FORWARD -d 192.168.0.24 -j ACCEPT
-A FORWARD -s 192.168.0.25 -j ACCEPT
-A FORWARD -d 192.168.0.25 -j ACCEPT
-A FORWARD -s 192.168.0.26 -j ACCEPT
-A FORWARD -d 192.168.0.26 -j ACCEPT
-A FORWARD -s 192.168.0.27 -j ACCEPT
-A FORWARD -d 192.168.0.27 -j ACCEPT
-A FORWARD -s 192.168.0.28 -j ACCEPT
-A FORWARD -d 192.168.0.28 -j ACCEPT
-A FORWARD -s 192.168.0.29 -j ACCEPT
-A FORWARD -d 192.168.0.29 -j ACCEPT
-A FORWARD -s 192.168.0.30 -j ACCEPT
-A FORWARD -d 192.168.0.30 -j ACCEPT
-A FORWARD -j DROP
COMMIT
# Completed on Mon Feb  6 22:52:49 2006
 # Generated by iptables-save v1.3.3 on Mon Feb  6 22:52:49
2006
*nat
:PREROUTING ACCEPT [2627:342859]
:POSTROUTING ACCEPT [95:7980]
:OUTPUT ACCEPT [104:8516]
 -A PREROUTING -s ! 192.168.0.2 -d 85.130.113.XXX -p tcp -m
tcp --dport 4662 -j DNAT --to-destination 192.168.0.2:4662
 -A PREROUTING -s ! 192.168.0.2 -d 85.130.113.XXX -p tcp -m
tcp --dport 4672 -j DNAT --to-destination 192.168.0.2:4672
 -A PREROUTING -s ! 192.168.0.5 -d 85.130.113.XXX -p tcp -m
tcp --dport 4662 -j DNAT --to-destination 192.168.0.5:4662
 -A PREROUTING -s ! 192.168.0.5 -d 85.130.113.XXX -p tcp -m
tcp --dport 4672 -j DNAT --to-destination 192.168.0.5:4672
 -A PREROUTING -s ! 192.168.0.8 -d 85.130.113.XXX -p tcp -m
tcp --dport 4662 -j DNAT --to-destination 192.168.0.8:4662
 -A PREROUTING -s ! 192.168.0.8 -d 85.130.113.XXX -p tcp -m
tcp --dport 4672 -j DNAT --to-destination 192.168.0.8:4672
-A POSTROUTING -o ppp0 -j MASQUERADE
COMMIT
# Completed on Mon Feb  6 22:52:49 2006
root@hostname:~#

 При това положение се пингват, обаче когато се Интернет-а не
 иска да се рутира. Интернет връзката ми е PPPOE. Ако когато
 си настройвам PPPOE си избера NONE за firewall ип-тата се
 пингват, но ако си избера MASQUERADING за firewall пинг-а
 спира. Когато няма firewall rules router-a има интернет, но
 другите машини дори не могат да го пингнат. Моля, Ви
помогнете!

 Smbd, наистина си омазал нещата и за това ще ти препоръчам:
четене, четене и отново четене на man iptables. Успех