I got a server with 2 NIC's.
One is the external interface, that has a public IP.
When only that interface is up, I can ping it fine from our internal network.
When I enable the second interface with the internal IP address on, I cannot ping the external IP anymore from the internal network. I can however ping it from a server on another internet connection.
I have been dealing with this for quite some time, and I really cant figure out why it won't work..
I have rebooted the server numerous times, without effect.
Interface configurations are as follows:
ifcfg-eth0 (External)
DEVICE="eth0"
BOOTPROTO="static"
HWADDR="00:24:81:82:D2:26"
NM_CONTROLLED="yes"
ONBOOT="yes"
TYPE="Ethernet"
UUID="d8c860fb-eab3-410c-a137-b100fa77ca51"
NETMASK="255.255.255.240"
IPADDR="7x.6x.1xx.1xx"
ifcfg-eth2 (Internal)
DEVICE="eth2"
BOOTPROTO="static"
HWADDR="00:23:7D:9C:CA:A7"
NM_CONTROLLED="yes"
ONBOOT="yes"
TYPE="Ethernet"
UUID="d544ec14-80fa-4765-bec4-e616b0b86bb8"
NETMASK="255.255.255.0"
IPADDR="192.168.11.15"
/etc/sysconfig/network
NETWORKING=yes
HOSTNAME=HOSTNAME
GATEWAY=7x.6x.1xx.1xx
Routing table
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
7x.6x.1xx.1xx * 255.255.255.240 U 0 0 0 eth0
192.168.11.0 * 255.255.255.0 U 0 0 0 eth2
link-local * 255.255.0.0 U 1002 0 0 eth0
link-local * 255.255.0.0 U 1004 0 0 eth2
default ip07x06x1xx1xx. 0.0.0.0 UG 0 0 0 eth0
I am pinging from a computer in the 192.168.11.0 network. There is a hardware firewall between them, but the logs show nothing of interest.
They are connected to the same switch on the 192.168.11.0 network.