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Old 02-05-2005, 11:53 AM   #16
shutuphuman
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Registered: Jan 2005
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no affraid not (thats how i check to see if was working)

is there anyway to check a config file or something that everything is set up correctly and then i will know the issue is with ip addressing

or dns stuff
 
Old 02-05-2005, 02:40 PM   #17
comprookie2000
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If your new to iptables,use firestarter,here is the part on NAT;
http://firestarter.sourceforge.net/manual/nat.php
 
Old 02-06-2005, 07:50 AM   #18
shutuphuman
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havnt a clue where im going wrong now....

so this is what i have typed in .. as instructed

[root@localhost server]# echo 1> /proc/sys/net/ipv4/ip_forward
[root@localhost server]# iptables -t nat -A POSTROUTING -o eth0 -j SNAT --to-source 192.168.0.1 -s 192.168.0.2
[root@localhost server]# iptables -A FORWARD -i eth0 -o eth1 -m state --state ESTABLISHED,RELATED -j ACCEPT
[root@localhost server]# iptables -A FORWARD -i eth1 -o eth0 -j ACCEPT
[root@localhost server]# iptables -nL
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain RH-Firewall-1-INPUT (0 references)
target prot opt source destination
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 255
ACCEPT esp -- 0.0.0.0/0 0.0.0.0/0
ACCEPT ah -- 0.0.0.0/0 0.0.0.0/0
ACCEPT udp -- 0.0.0.0/0 224.0.0.251 udp dpt:5353
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:631
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited
[root@localhost server]#

my set ups is as follows....

internet,, ------ eth0 ----- server
........................................... |____ eth1-------- HUB -------------(client_eth0)

where eth0 is ip = 192.168.1.4 255.255.255.0 default gateway 192.168.1.1 DNS = 192.168.1.1
and eth1 is ip = 192.168.0.1 255.255.255.0 default gateway 192.168.1.4

and client_eth0 is 192.168.0.2 255.255.255.0 and its default gateway points to 192.168.0.1 DNS 192.168.0.1

i can ping the server from the client, the server can access the interenet and ping the client..
but the client cannot ping or get any internet access

please help this is driving me insane

Last edited by shutuphuman; 02-06-2005 at 07:56 AM.
 
Old 02-06-2005, 08:20 AM   #19
comprookie2000
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iptables -I FORWARD -i eth0 -d 192.168.0.0/255.255.0.0 -j DROP
iptables -A FORWARD -i eth0 -s 192.168.0.0/255.255.0.0 -j ACCEPT
iptables -A FORWARD -i eth1 -d 192.168.0.0/255.255.0.0 -j ACCEPT
iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE
Try adding this on the server,you may need to reverse the eth0 and eth1 as that is for
WAN eth1 box eth0 intranet

Last edited by comprookie2000; 02-06-2005 at 08:22 AM.
 
Old 02-06-2005, 08:39 AM   #20
shutuphuman
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ok well i get this now...

but still doesnt allow the client to actually access the net

[root@localhost tmp]# iptables -nL
Chain INPUT (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- 0.0.0.0/0 0.0.0.0/0

Chain FORWARD (policy ACCEPT)
target prot opt source destination
DROP all -- 0.0.0.0/0 192.168.0.0/16
RH-Firewall-1-INPUT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT all -- 0.0.0.0/0 192.168.0.0/16

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Chain RH-Firewall-1-INPUT (2 references)
target prot opt source destination
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0
ACCEPT icmp -- 0.0.0.0/0 0.0.0.0/0 icmp type 255
ACCEPT esp -- 0.0.0.0/0 0.0.0.0/0
ACCEPT ah -- 0.0.0.0/0 0.0.0.0/0
ACCEPT udp -- 0.0.0.0/0 224.0.0.251 udp dpt:5353
ACCEPT udp -- 0.0.0.0/0 0.0.0.0/0 udp dpt:631
ACCEPT all -- 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED
ACCEPT tcp -- 0.0.0.0/0 0.0.0.0/0 state NEW tcp dpt:22
REJECT all -- 0.0.0.0/0 0.0.0.0/0 reject-with icmp-host-prohibited

Last edited by shutuphuman; 02-06-2005 at 08:43 AM.
 
Old 02-06-2005, 09:07 AM   #21
comprookie2000
Gentoo Developer
 
Registered: Feb 2004
Location: Fort Lauderdale FL.
Distribution: Gentoo
Posts: 3,291
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On the server did you link eth0 and eth1 for gentoo its
ln -s net.eth0 /etc/init.d/net.eth1
here is the guide I used,may help with iptables
http://www.gentoo.org/doc/en/home-router-howto.xml
 
  


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