Hello,
I have a problem with my network at work. I will describe short the
installation of my network and what problem I have.
It is a cluster with sereral pc (only debian systems) with one server,
which serves as fileserver, dhcp server, local dns-server and so on.
Then I set up an extra loginserver and only the server and the
loginserver have an extern IP address. All the nodes of the cluster have
ips in the local network and the loginserver and fileserver have
external ips and internal ips. between the loginserver and fileserver is
also a firewall.
Now the Problem: Everything works fine, I mean that i can reach every
computer from any pc in the local network and i can reach the
loginserver and fileserver from extern.
But I can't reach the loginserver from the fileserver. I can't ping, or
ssh to it, when I use the internal IP address of the loginserver. What
strange is, that i can ping from the loginserver to the fileserver
without any Problem. I tried to find the problem, but I don't get it.
(external addresses are 134.2.*.* and internal addresses are
192.168.1.*, fileserver has 192.168.1.1 and loginserver 192.168.1.2)
Some output from the loginserver:
lspci -v | grep Ether
01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721
Gigabit Ethernet PCI Express (rev 11)
Subsystem: Broadcom Corporation NetXtreme BCM5721 Gigabit
Ethernet PCI Express
02:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5721
Gigabit Ethernet PCI Express (rev 11)
Subsystem: Broadcom Corporation NetXtreme BCM5721 Gigabit
Ethernet PCI Express
ifconfig -v
eth0 Link encap:Ethernet HWaddr 00:E0:81:2D:A6:E2
inet addr:134.2.180.192 Bcast:134.2.255.255 Mask:255.255.0.0
inet6 addr: fe80::2e0:81ff:fe2d:a6e2/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:901063 errors:0 dropped:0 overruns:0 frame:7
TX packets:2299546 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:150252974 (143.2 MiB) TX bytes:3298738644 (3.0 GiB)
Interrupt:169
eth1 Link encap:Ethernet HWaddr 00:E0:81:2D:A6:E3
inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:81ff:fe2d:a6e3/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3378341 errors:0 dropped:0 overruns:0 frame:0
TX packets:2137499 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3873940232 (3.6 GiB) TX bytes:272342735 (259.7 MiB)
Interrupt:169
route -en
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
134.2.180.191 0.0.0.0 255.255.255.255 UH 0 0 0
eth0
134.2.180.193 0.0.0.0 255.255.255.255 UH 0 0 0
eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0
eth1
134.2.0.0 134.2.180.191 255.255.0.0 UG 0 0 0
eth0
0.0.0.0 134.2.180.191 0.0.0.0 UG 0 0 0
eth0
some output from fileserver:
ifconfig -a
eth0 Link encap:Ethernet HWaddr 00:30:48:C3:FE:2A
inet addr:134.2.180.193 Bcast:134.2.255.255 Mask:255.255.0.0
inet6 addr: fe80::230:48ff:fec3:fe2a/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:802938552 errors:0 dropped:0 overruns:0 frame:0
TX packets:597120351 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:850023992338 (791.6 GiB) TX bytes:366997720384
(341.7 GiB)
eth1 Link encap:Ethernet HWaddr 00:30:48:C3:FE:2B
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::230:48ff:fec3:fe2b/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:9751734720 errors:0 dropped:0 overruns:0 frame:0
TX packets:7767688483 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:9357536869878 (8.5 TiB) TX bytes:3240504190213 (2.9
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)
TiB)
route -en
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt
Iface
192.168.1.2 0.0.0.0 255.255.255.255 UH 0 0 0
eth1
134.2.180.191 0.0.0.0 255.255.255.255 UH 0 0 0
eth0
134.2.180.192 0.0.0.0 255.255.255.255 UH 0 0 0
eth0
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0
eth1
134.2.0.0 134.2.180.191 255.255.0.0 UG 0 0 0
eth0
0.0.0.0 134.2.180.191 0.0.0.0 UG 0 0 0
eth0
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