On Fri, 2005-04-15 at 11:42 -0700, Jesus E Zepeda wrote:
> Hi, Craig:
>
> I tried setting the Gateway to eth0 with no positive result. Eventhough
> both are on the same machine the subnet is different.
>
> As far as acting as a router, the /proc/sys/net/ipv4/ip_forward is equal
> 1
>
> These are the outputs you instructed:
>
> Thanks. Jesus...
> -----
> route -n
>
> [root@custom1 root]# route -n
> Kernel IP routing table
> Destination Gateway Genmask Flags Metric Ref Use
> Iface
> 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0
> eth1
> 10.100.0.0 0.0.0.0 255.255.0.0 U 0 0 0
> eth0
> 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0
> eth0
> 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0
> lo
> 0.0.0.0 10.100.1.245 0.0.0.0 UG 0 0 0
> eth0
> [root@custom1 root]#
>
> -----
> [root@custom1 root]# ifconfig -a
> eth0 Link encap:Ethernet HWaddr 00:A0:CC:D9:7D:E0
> inet addr:10.100.1.102 Bcast:10.100.255.255 Mask:255.255.0.0
> inet6 addr: fe80::2a0:ccff:fed9:7de0/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:234 errors:1 dropped:0 overruns:0 frame:0
> TX packets:321 errors:523 dropped:0 overruns:0 carrier:1042
> collisions:0 txqueuelen:1000
> RX bytes:23727 (23.1 Kb) TX bytes:36623 (35.7 Kb)
> Interrupt:9 Base address:0x1400
>
> eth1 Link encap:Ethernet HWaddr 00:50:04:D8:79:A3
> inet addr:192.168.1.204 Bcast:192.168.1.255
> Mask:255.255.255.0
> inet6 addr: fe80::250:4ff:fed8:79a3/64 Scope:Link
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:4712 errors:0 dropped:0 overruns:1 frame:0
> TX packets:3718 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:648107 (632.9 Kb) TX bytes:739930 (722.5 Kb)
> Interrupt:11 Base address:0x1800
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> inet6 addr: ::1/128 Scope:Host
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:5402 errors:0 dropped:0 overruns:0 frame:0
> TX packets:5402 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:2746643 (2.6 Mb) TX bytes:2746643 (2.6 Mb)
>
> sit0 Link encap:IPv6-in-IPv4
> NOARP MTU:1480 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0 frame:0
> TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
>
>
> ------
> cat /etc/sysconfig/network-scripts/ifcfg-eth0
>
> [# Please read /usr/share/doc/initscripts-*/sysconfig.txt
> # for the documentation of these parameters.
> IPV6INIT=no
> ONBOOT=yes
> USERCTL=no
> PEERDNS=yes
> GATEWAY=10.100.1.245
> TYPE=Ethernet
> DEVICE=eth0
> HWADDR=00:a0:cc:d9:7d:e0
> BOOTPROTO=none
> NETMASK=255.255.0.0
> IPADDR=10.100.1.102
>
> ----------
> cat /etc/sysconfig/network-scripts/ifcfg-eth1
>
> # Please read /usr/share/doc/initscripts-*/sysconfig.txt
> # for the documentation of these parameters.
> IPV6INIT=no
> ONBOOT=yes
> USERCTL=no
> PEERDNS=yes
> GATEWAY=10.100.1.102
> TYPE=Ethernet
> DEVICE=eth1
> HWADDR=00:50:04:d8:79:a3
> BOOTPROTO=none
> NETMASK=255.255.255.0
> IPADDR=192.168.1.204
>
> -----
> cat /etc/sysconfig/network
>
> NETWORKING=yes
> HOSTNAME=custom1
>
> -----Original Message-----
> From: Craig White [mailto:craigwhite@azapple.com]
> Sent: Friday, April 15, 2005 10:55
> To: plug-discuss@lists.plug.phoenix.az.us
> Subject: Re: Eth1 and eth0
>
>
> On Fri, 2005-04-15 at 10:34 -0700, Jesus E Zepeda wrote:
> > Hello, list:
> >
> > I am using Fedora Core 2 in my computer, which is setup with two NICs:
>
> > Eth1 NIC is connected to the LAN; and eth0 connected to the Internet.
> > Also, eth1 NIC has as a gateway an interface of a router.
> >
> > Both eth0 and eth1 are active. I can ping from one another interface
> > and to any host on either side. The problem I have is that I cannot
> > reach the other side of the router.
> >
> > What can I do to be able to have my computer talk to both sides and
> > across the router, when I know that the router will reply on the other
>
> > side if I have eth0 (Internet) removed?
> ----
> seems to me that the gateway device should be eth0.
>
> it would be easier if you gave us the output of...
>
> route -n
>
> ifconfig -a
>
> cat /etc/sysconfig/network-scripts/ifcfg-eth0
>
> cat /etc/sysconfig/network-scripts/ifcfg-eth1
>
> cat /etc/sysconfig/network
>
> also, to act as a router, your probably need to do some things like...
> echo "1" > /proc/sys/net/ipv4/ip_forward
>
> suggest that you look at...
> http://www.ecst.csuchico.edu/~dranch/LINUX/ipmasq/c-html/stronger-
> firewall-examples.html#RC.FIREWALL-2.4.X-STRONGER
----
both eth0 and eth1 have a gateway address...that's a no-no
I would remove both Gateway entries by editing
/etc/sysconfig/network-scripts/ifcfg-eth0
and
/etc/sysconfig/network-scripts/ifcfg-eth1
and IF as you say, your 'INTERNET' connection is truly 10.100.1.102 AND
they instructed you to use 255.255.255.0 for a subnet mask AND they
instructed you to use 10.100.1.145 as a gateway/router address, then I
would edit
/etc/sysconfig/network
and add two lines...
GATEWAYDEV=eth0
GATEWAY=10.100.1.145
and then save it
issue command '/sbin/service network restart'
Then you should be able to ping 10.100.1.145 - if you can't ping that,
you have a problem to be sure. If that succeeds, you should try to ping
64.12.187.22 which is the host address referenced for
www.aol.com.
if 'cat /etc/resolv.conf' lists the dns servers provided for you to use,
you should be able to ping anywhere...
ping
www.yahoo.com
ping
www.aol.com
ping
www.msn.com
etc.
The ip_forward command would allow you to set up IPTABLES rules to
'masquerade' packets for other computers on the 192.168.1.0 network - of
course, that won't work until that computer can reach the internet.
You can check out the referenced link for a set of IPTABLES rules that
will handle this for you as well as load necessary modules for ftp and
irc stuff.
IF you can ping the above stuff from the Linux system but still can't
reach the internet from the other computers on the LAN, then provide us
with output of the following command...
iptables -L -n
Craig
---------------------------------------------------
PLUG-discuss mailing list -
PLUG-discuss@lists.plug.phoenix.az.us
To subscribe, unsubscribe, or to change you mail settings:
http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss
(text/plain)