2 ip setup?

[Kev King]

:confused:

I am running a Debian etch server, has been working relatively ok, on one IP address.

Have the option of a second IP address. Only problem is, everytime I enable the second address, the server goes down after a short while. I suspect firewall or intrusion to be the problem.

How do i secure the second ip like the first one.

Want to set up something like:

eth0 (net) external connection
eth1 (loc) internal.

Have tried looking at ssh setup, but there is no hostname or ip to set or configure for each address?

There is no entries in hosts.allow or hosts.deny would this cause a problem?

Would greatly appreciate any help or guidance.

[falko]

Any errors in your logs?
What's in /etc/network/interfaces?
What's the output of ifconfig?

[Kev King]

Thankyou falko for your reply.

What error logs am I looking for?

output of /etc/network/interfaces:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
address 85.17.138.15
netmask 255.255.255.128
network 85.17.138.0
broadcast 85.17.138.127
gateway 85.17.138.126

auto eth1
iface eth1 inet static
address 85.17.138.62
netmask 255.255.255.128
network 85.17.138.0
broadcast 85.17.138.127
gateway 85.17.138.126

auto eth0:1
iface eth0:1 inet static
address 85.17.138.62
netmask 255.255.255.128

output of ifconfig:

ifconfig
eth0 Link encap:Ethernet HWaddr 00:1D:92:46:FD:84
inet addr:85.17.138.15 Bcast:85.17.138.127 Mask:255.255.255.128
inet6 addr: fe80::21d:92ff:fe46:fd84/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:10922 errors:0 dropped:0 overruns:0 frame:0
TX packets:3140 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:1362087 (1.2 MiB) TX bytes:506235 (494.3 KiB)
Base address:0xdf00 Memory:fdee0000-fdf00000

eth0:1 Link encap:Ethernet HWaddr 00:1D:92:46:FD:84
inet addr:85.17.138.62 Bcast:85.17.138.127 Mask:255.255.255.128
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Base address:0xdf00 Memory:fdee0000-fdf00000

eth1 Link encap:Ethernet HWaddr 00:1D:92:46:FD:85
inet addr:85.17.138.62 Bcast:85.17.138.127 Mask:255.255.255.128
UP BROADCAST MULTICAST MTU:1500 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:1000
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
Base address:0xcf00 Memory:fdce0000-fdd00000

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:3190 errors:0 dropped:0 overruns:0 frame:0
TX packets:3190 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:305452 (298.2 KiB) TX bytes:305452 (298.2 KiB)

[falko]

output of /etc/network/interfaces:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
address 85.17.138.15
netmask 255.255.255.128
network 85.17.138.0
broadcast 85.17.138.127
gateway 85.17.138.126

auto eth1
iface eth1 inet static
address 85.17.138.62
netmask 255.255.255.128
network 85.17.138.0
broadcast 85.17.138.127
gateway 85.17.138.126

auto eth0:1
iface eth0:1 inet static
address 85.17.138.62
netmask 255.255.255.128



eth1 and eth0:1 are both using the same IP address. This cannot work.

also, make sure that your network settings (subnetmask, broadcast, etc.) are correct. This link might help you: www.subnetmask.info