| K4M5Y5 |
04-15-2012 10:56 AM |
CentOS 6.2: Multiple gateways, NIC Problems, Cannot ping all network machines.
Hello everyone,
I have problem with network, I have tried to solve it, but all solutions didn't help.
I have placed link to PNG which describes network topology it may be useful for better understanding.
http://k4m5y5-h4x0r-1337.net84.net/LQ/topology.png
Problem:
- When two network interfaces are enabled I cannot ping any devices from 172.17.X.*
- When eth2 (WAN) is disabled and eth0 is enabled I'm getting ping from 172.17.X.*
Still I can do ping to router 172.17.100.250 which is connected to eth0 even when both of interfaces are enabled. I'm losing hope to fix the problem.
I need to have access to both of: Internet and Network (left and right side of the attached screen).
Below I have placed some configs from server, if it is not enough please do not hesitate to ask for more.
ifconfig
Code:
eth0 Link encap:Ethernet HWaddr 00:04:75:B4:55:05
inet addr:172.17.100.53 Bcast:172.17.100.255 Mask:255.255.255.0
inet6 addr: fe80::204:75ff:feb4:5505/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:19540251 errors:0 dropped:0 overruns:0 frame:0
TX packets:22540837 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2481040669 (2.3 GiB) TX bytes:2166254248 (2.0 GiB)
Interrupt:201 Base address:0xc000
eth2 Link encap:Ethernet HWaddr 00:0F:1F:6E:D6:AE
inet addr:190.*.*.147 Bcast:190.*.*.151 Mask:255.255.255.248
inet6 addr: fe80::20f:1fff:fe6e:d6ae/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3162004 errors:0 dropped:0 overruns:0 frame:0
TX packets:4273887 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1025423614 (977.9 MiB) TX bytes:1026558159 (979.0 MiB)
Interrupt:217 Memory:fcd00000-fcd10000
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:52353 errors:0 dropped:0 overruns:0 frame:0
TX packets:52353 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:14523516 (13.8 MiB) TX bytes:14523516 (13.8 MiB)
iptables -L
Code:
Chain INPUT (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere
Chain FORWARD (policy ACCEPT)
target prot opt source destination
RH-Firewall-1-INPUT all -- anywhere anywhere
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
Chain RH-Firewall-1-INPUT (2 references)
target prot opt source destination
ACCEPT all -- anywhere anywhere
ACCEPT icmp -- anywhere anywhere icmp any
ACCEPT esp -- anywhere anywhere
ACCEPT ah -- anywhere anywhere
ACCEPT udp -- anywhere 224.0.0.251 udp dpt:mdns
ACCEPT udp -- anywhere anywhere udp dpt:ipp
ACCEPT tcp -- anywhere anywhere tcp dpt:ipp
ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:smtp
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:ftp
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:nfs
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:ssh
ACCEPT udp -- anywhere anywhere state NEW udp dpt:netbios-ns
ACCEPT udp -- anywhere anywhere state NEW udp dpt:netbios-dgm
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:netbios-ssn
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:microsoft-ds
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:telnet
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:http
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:https
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:mysql
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:webcache
REJECT all -- anywhere anywhere reject-with icmp-host-prohibited
ACCEPT tcp -- anywhere anywhere state NEW tcp dpt:postgres
route -n
Code:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
190.*.*.144 0.0.0.0 255.255.255.248 U 0 0 0 eth2
172.17.100.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth2
0.0.0.0 190.*.*.145 0.0.0.0 UG 0 0 0 eth2
I am waiting for any kind of suggestions...
Best Regards,
Kamil |
