Cannot ping/access internal LAN computers

AndrewTheArt · 11-19-2007, 09:18 AM

Hey all -

I recently did a massive Smart Upgrade and upgraded all my packages. This might be besides the point, but I'm mentioning it just in case. Anyway, it installed kernel 2.24 rc2, which I didn't have the headers or source for, so I couldn't rebuild some of my kernel modules (vmware, etc) - thusly I downgraded back to 2.18.

I got back into a GUI and everything was going great. I could browse the web perfectly, etc. Until I realized that I couldn't ping anybody within my own network!!!

Code:

linux-drew:~ # ping 192.168.1.104
PING 192.168.1.104 (192.168.1.104) 56(84) bytes of data.
From 192.168.1.103: icmp_seq=1 Destination Host Unreachable
From 192.168.1.103 icmp_seq=1 Destination Host Unreachable
From 192.168.1.103 icmp_seq=2 Destination Host Unreachable
From 192.168.1.103 icmp_seq=3 Destination Host Unreachable
From 192.168.1.103 icmp_seq=4 Destination Host Unreachable
From 192.168.1.103 icmp_seq=5 Destination Host Unreachable
From 192.168.1.103 icmp_seq=6 Destination Host Unreachable

I also found that Samba was broken, but this didn't surprise me considering that I couldn't reach my computers with a ping.

Code:

linux-drew:~ # smbclient //oemcomputer/spool
Error connecting to 192.168.1.104 (No route to host)
Connection to oemcomputer failed

Any ideas? What could have broken? My other machines (windows machines) can all see each other fine ATM. From what I can see, my /etc/hosts hasn't changed either.

Code:

linux-drew:~ # 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 eth0
172.16.15.0	 0.0.0.0		 255.255.255.0   U	 0	  0		0 vmnet8
192.168.89.0	0.0.0.0		 255.255.255.0   U	 0	  0		0 vmnet1
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		 192.168.1.1	 0.0.0.0		 UG	0	  0		0 eth0

Code:

linux-drew:~ # arp
Address				  HWtype  HWaddress		   Flags Mask			Iface
oemcomputer					  (incomplete)							  eth0
192.168.1.1			  ether   <private mac address is censored here>   C					 eth0

Code:

linux-drew:~ # ifconfig
eth0	  Link encap:Ethernet  HWaddr 00:0C:F1:EE:CA:AF
		  inet addr:192.168.1.103  Bcast:192.168.1.255  Mask:255.255.255.0
		  inet6 addr: fe80::20c:f1ff:feee:caaf/64 Scope:Link
		  UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
		  RX packets:5081 errors:0 dropped:0 overruns:0 frame:0
		  TX packets:5702 errors:0 dropped:0 overruns:0 carrier:0
		  collisions:0 txqueuelen:1000
		  RX bytes:3499550 (3.3 Mb)  TX bytes:2298648 (2.1 Mb)

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:629 errors:0 dropped:0 overruns:0 frame:0
		  TX packets:629 errors:0 dropped:0 overruns:0 carrier:0
		  collisions:0 txqueuelen:0
		  RX bytes:145911 (142.4 Kb)  TX bytes:145911 (142.4 Kb)

vmnet1	Link encap:Ethernet  HWaddr 00:50:56:C0:00:01
		  inet addr:192.168.89.1  Bcast:192.168.89.255  Mask:255.255.255.0
		  inet6 addr: fe80::250:56ff:fec0:1/64 Scope:Link
		  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
		  RX packets:0 errors:0 dropped:0 overruns:0 frame:0
		  TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
		  collisions:0 txqueuelen:1000
		  RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vmnet8	Link encap:Ethernet  HWaddr 00:50:56:C0:00:08
		  inet addr:172.16.15.1  Bcast:172.16.15.255  Mask:255.255.255.0
		  inet6 addr: fe80::250:56ff:fec0:8/64 Scope:Link
		  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
		  RX packets:0 errors:0 dropped:0 overruns:0 frame:0
		  TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
		  collisions:0 txqueuelen:1000
		  RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

Running openSUSE 10.2 in a home network.

{BBI}Nexus{BBI} · 11-19-2007, 05:43 PM

I don't see your /etc/hosts output. Could your firewall (if you're running one) be blocking your ping attempts?

AndrewTheArt · 11-19-2007, 06:25 PM

I'm fairly certain that downgrading and then upgrading the kernel reset my DNS server configuration and settings. In YaST, it is asking me to set this up when I go the YaST DNS server module. Problem is, I have no idea how to set it up. I think it was autoconfigured when SUSE first installed.

Any insight would be greatly appreciated.

Code:

linux-drew:~ # cat /etc/hosts
#
# hosts         This file describes a number of hostname-to-address
#               mappings for the TCP/IP subsystem.  It is mostly
#               used at boot time, when no name servers are running.
#               On small systems, this file can be used instead of a
#               "named" name server.
# Syntax:
#
# IP-Address  Full-Qualified-Hostname  Short-Hostname
#

127.0.0.1       localhost

# special IPv6 addresses
::1             localhost ipv6-localhost ipv6-loopback

fe00::0         ipv6-localnet

ff00::0         ipv6-mcastprefix
ff02::1         ipv6-allnodes
ff02::2         ipv6-allrouters
ff02::3         ipv6-allhosts
127.0.0.2       linux-drew.linux-drew linux-drew
192.168.1.104   oemcomputer oemcomputer