ubuntu and static IP address

[Steve Alex]

On May 23, 2005, at 12:59 PM, Steve Alex wrote:

>
> On May 23, 2005, at 11:56 AM, sujit sinha wrote:
>
>> Hi,
>> I just joined Ububtu and have a static IP address. The problem is 
>> when I boot up the computer, sometime I am connected to the net, 
>> i.e., the network recognises me and sometime I am not. If I go get 
>> the network connection from the menu and deactivate and reactivate 
>> the network protocol then it starts fine.
>>
>> Any one had an similar problem? I am using a headless machine, so it 
>> is hard for me to do anything unless I have an IP address.
>
> I'm trying to build a case now that there is something strange going 
> on with static IP addresses in Ubuntu. I posted something a few days 
> ago "ssh Connection reset by peer problems " where I've been 
> experiencing unreliable network connections that show up in ssh. Of 
> course I got no response to that post. I though I had traced the 
> unreliability down to difference in the install on two Dell platforms, 
> but now it is pointing to the difference is between using DHCP or 
> static address.
>
> I had the system up all weekend on a couple connections (with a DHCP 
> address), one of them running a script (AppleScript terminal script) 
> that did a date command every minute. Those connections stayed up all 
> weekend.
>
> This morning, figuring I had a band-aid, I did two actions. I did a 
> Ubuntu Update manager, and changed the network address to a static IP 
> address. I did a little minor checking between the two and did not see 
> a problem with the update. After changing the network to static and 
> running my script, the connection will be reset after about 20 
> minutes. I tried it twice with the same results. Changed back to DHCP 
> and it's been going for over an hour.
>
> My post points to some other details in previous posts, but when I 
> first tryed to find the problem I would get things like "Socket 
> somthing" failed. Then it would refuse connection of port 22 (ssh) for 
> about 2 minutes, and then it would connect.
>
> Again, something strange going on and I've wasted a few hours a day 
> for about two week and the Ubuntu list and other resources I've tried 
> (bugzilla) don't seem to be of much help.
>
> Steve
>

Once again I've proven that you can try to blame someone else for a 
problem, but often you have no one to blame but yourself :-(   It 
appears that we assigned the same static address to both the Ubuntu box 
and a AXIS 7000 document server that had not been put into full 
production. The scanner was turn off and we failed to put an address in 
DNS or some other trackable means. Once turned on, neither box 
complained that they both had the same address except when ssh was 
trying a KeepAlive or something - then it would reset the connection.

I'm sure I've received a reply somewhere in my quest for a solution to 
make sure I didn't have two devices with the same IP. Pinging an 
address to see if it is free is not reliable!

Sujit, you may want to check and make sure your problem is not the same 
as the one we caused by our dumb mistake.

Sorry,
Steve
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