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Old 06-29-2004, 08:09 AM   #1
lrt2003
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Registered: Mar 2004
Distribution: Fedora 10
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Trouble networking two Linux computers (via crossover cable)


Hi there!

I connect to the internet through eth1 (external)... and have another network card (eth0) that has a crossover cable to another linux machine.

This is what I am doing:

(first, host computer)

# /etc/rc.d/rc.inet1.conf
#
# This file contains the configuration settings for network interfaces.
# If USE_DHCP[interface] is set to "yes", this overrides any other settings.
# If you don't have an interface, leave the settings null ("").

# Config information for eth0:
IPADDR[0]="192.168.10.1"
NETMASK[0]=""
USE_DHCP[0]=""
DHCP_HOSTNAME[0]=""

# Config information for eth1:
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]="yes"
DHCP_HOSTNAME[1]=""

# Config information for eth2:
IPADDR[2]=""
NETMASK[2]=""
USE_DHCP[2]=""
DHCP_HOSTNAME[2]=""

# Config information for eth3:
IPADDR[3]=""
NETMASK[3]=""
USE_DHCP[3]=""
DHCP_HOSTNAME[3]=""

# Default gateway IP address:
GATEWAY=""

# Change this to "yes" for debugging output to stdout. Unfortunately,
# /sbin/hotplug seems to disable stdout so you'll only see debugging output
# when rc.inet1 is called directly.
DEBUG_ETH_UP="no"

-- itest.sh
#!/bin/bash
# just temporary
# Delete and flush. Default table is "filter". Others like "nat" must be explicitly stated.
/usr/sbin/iptables --flush
/usr/sbin/iptables --table nat --flush
/usr/sbin/iptables --delete-chain
/usr/sbin/iptables --table nat --delete-chain
/usr/sbin/iptables -F INPUT
/usr/sbin/iptables -F OUTPUT
/usr/sbin/iptables -F FORWARD
/usr/sbin/iptables -P INPUT ACCEPT
/usr/sbin/iptables -P FORWARD ACCEPT
/usr/sbin/iptables -P OUTPUT ACCEPT
# Allow established connections and programs that use loopback
/usr/sbin/iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
/usr/sbin/iptables -A INPUT -s 127.0.0.0/8 -d 127.0.0.0/8 -i lo -j ACCEPT
# Masking
echo 1 > /proc/sys/net/ipv4/ip_forward
iptables -t nat -A POSTROUTING -j MASQUERADE -o eth1

(client)

# /etc/rc.d/rc.inet1.conf
#
# This file contains the configuration settings for network interfaces.
# If USE_DHCP[interface] is set to "yes", this overrides any other settings.
# If you don't have an interface, leave the settings null ("").

# Config information for eth0:
IPADDR[0]="192.168.10.2"
NETMASK[0]=""
USE_DHCP[0]=""
DHCP_HOSTNAME[0]=""

# Config information for eth1:
IPADDR[1]=""
NETMASK[1]=""
USE_DHCP[1]="yes"
DHCP_HOSTNAME[1]=""

# Config information for eth2:
IPADDR[2]=""
NETMASK[2]=""
USE_DHCP[2]=""
DHCP_HOSTNAME[2]=""

# Config information for eth3:
IPADDR[3]=""
NETMASK[3]=""
USE_DHCP[3]=""
DHCP_HOSTNAME[3]=""

# Default gateway IP address:
GATEWAY="192.168.10.1"

# Change this to "yes" for debugging output to stdout. Unfortunately,
# /sbin/hotplug seems to disable stdout so you'll only see debugging output
# when rc.inet1 is called directly.
DEBUG_ETH_UP="no"

I think I've missed something...

Last edited by lrt2003; 06-29-2004 at 09:06 AM.
 
Old 06-29-2004, 08:21 AM   #2
fluppi
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Registered: Oct 2003
Location: Switzerland (Europe)
Distribution: OpenSuSE, RedHat, Knoppix, IRIX + MacOSX
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Where is the router-daemon ? (I assume you want connect via the crossover into host an then out through the external link into internet)
 
Old 06-29-2004, 08:30 AM   #3
lrt2003
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Registered: Mar 2004
Distribution: Fedora 10
Posts: 182

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a route add command?
 
Old 06-29-2004, 09:06 AM   #4
lrt2003
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Registered: Mar 2004
Distribution: Fedora 10
Posts: 182

Original Poster
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tried this on host: (then on client after doing research)

route add -net 192.168.10.0 netmask 255.255.255.0 gw 192.168.10.1 dev eth0

then route add default gw 192.168.10.1

they can ping eachother but that's it (I want them to share internet connection)

Last edited by lrt2003; 06-29-2004 at 09:48 AM.
 
  


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