Have Redhat 9 installed. New to Linux so I've been tweaking, playong and probably doing things I shouldn't. Lost internet connectivity and start looking around. Tried pinging my router (192.168.1.1) and get back 192.168.1.77 not available. Hmmm, interesting.

Lets try pinging 4.2.4.1. Response 192.167.1.77 not available. Any other IP address - same response.

There seems to be a problem here. Either I've fiddled something I shouln't have or my machine has developed some type of compulsive attachment to 192.168.1.77.

Any ideas would be appreciated.

TT

What does the output of ifconfig look like? (ifconfig -a) What do you have in your routing table? (netstat -nr)

stickman:

Thanks for the help

ifconfig looks like:

eth0 Link encap:Ethernet HWaddr 00:30:1B:11:23:0B
inet addr:192.168.1.101 Bcast:192.168.1.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:25366 errors:42 dropped:0 overruns:0 frame:0
TX packets:5954 errors:0 dropped:0 overruns:0 carrier:0
collisions:3 txqueuelen:100
RX bytes:8600150 (8.2 Mb) TX bytes:1081911 (1.0 Mb)
Interrupt:11 Base address:0xa000

(+ the entry for the local loopback)

netstat looks like:

Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
192.168.1.0 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 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


OK, more wierdness....

Just ran redhat-config-network, it scolded me abut running as root at least once (which I have), gave me a lot of message about permissions. So, I su'd, ran redhat-config-network and saw that my host name wntry was blank (which it wasnt before), gave it a host name, deactivated and activated eth0 - and now all seems to be working fine.

Strange....

Thanks again for the help.

If I am not mistaken, you cannot use 192.168.1.x for your network. You have to use 192.168.0.x for your group of IP addresses (which is a reserved group for LAN/home networking)

Actually, I use 192.168.1.* for my LAN, running RH9 with no probs...

"If I am not mistaken, you cannot use 192.168.1.x for your network. You have to use 192.168.0.x for your group of IP addresses (which is a reserved group for LAN/home networking)"

Private non routable IP addresses include: (basically these addresses will not route through the public internet)

192.168.0.0/16
10.0.0.0/8
172.16.0.0/12

As per RFC 1918

Which means that for a private network you can use
192.168.0.xxx through 192.168.254.xxx for your home networking needs. Just be sure to use correct subnet masks.

Ok, I just remember checking into this a long time ago (RedHat 6.0) and was trying to recally back to then. All I know was I went in to all of my settings and changed the 192.168.1.x to 192.168.0.x and everything worked perfect. Perhaps it was something else that got it working like ifdown/ifuping the eth again.


BTW, what do you get if you ping localhost?

Problem seems to have gone away for good - as I discussed before I gave it a host name and reset eth0 - no problems since then.

Someone asked what I was getting on a ping to localhost - sorry - it was a few days ago and I can't recall.

I've moved on from this and am currently trying to destroy my setup with an upgrade to kde3.2 - but hey, that's what fresh installs are for.

Thanks all for the ideas and help.