LLRnet servers for NPLB

[mdettweiler]

Originally Posted by IronBits

That is well known problem. It's a really good idea to put that cable modem/DSL device on a UPS so it never get's turned off or reset.

Actually, believe it or not, power failures were not the reason why Gary's router was being power-cycled. For some reason (still unknown) his kids' laptop will refuse to connect to his router wirelessly (even though Gary has an identical laptop that connects just fine) unless he power-cycles it. Fortunately they haven't needed to use their laptop on his network for a while (i.e. since the last time the IP address changed ), though if anyone's got any ideas on how to fix this problem (without rebooting the router) then they would be greatly appreciated.

Originally Posted by MyDogBuster

Why not just disable DHCP?

This is DHCP on the ISP end, not on the internal network. We already have all of Gary's Linux quads set to static IPs on his internal network so that we can access them in a consistent location for VNC remote control--but most residential internet connections (whether broadband or dial-up) nowadays give you a dynamic public IP. There's not much you can do about it except pay extra for a "business class" connection that gives you a static IP, which we're hoping to avoid because of the extra cost involved.

Edit: Ah, I see IronBits beat me to the punch on the answer to this.

[MyDogBuster]

While I was installing LLRServer last night, I noticed than one of my quads was not on the network because I had it designated as Public not Private. As soon as I changed it to private, ALL my local IP addresses changed. Nice software Redmond, 254 numbers to choose from and you have to re-shuffle the first 11 available. I have since changed all the addresses' to static and turned off DHCP.

BTW, since I turned off DNS Client, I haven't had the problem of my clients hanging because of Gary's address changing. Hopefully thats solved. I see no decrease in speed because of having to resolve the DNS address each time I connect to the server. Another piece of useless Windows software.

Only about 80-100 services to go and maybe Windows will run faster.

As far as laptops go, I see that when my sister signs on to my LAN, her laptop tries to become TOP DOG and my quads all log a security error rejecting her claim to fame. She uses the same USB wireless adapter that I use. It must be a laptop thing.

[gd_barnes]

Mainly you haven't had the problem with my IP address changing because it likely hasn't. Since determining that flipping my router on and off was causing most of the IP address changing problem, I haven't done it.

One thing more I'll clarify: A majority of the time, my kids' laptop connects. Only once since we determined that the router flipping on-off was the source of the IP address problem has my kids' laptop not connected. I just told them to use my Windows laptop or desktop, which is what I will also do in the future. After all, I have plenty of machines that are connecting fine.

If my IP address changes in the future, it won't be because of flipping my router on-off unless I post that here several hours or a day ahead of time. I have occassionally had to do it to get MY laptop to connect after getting back from a business trip so that would be the main reason that I would have to do it.

Knock on wood, I think things have stabilized on my end. I can't guarantee that there won't be occassional power blips at times or that my ISP won't change my IP address for no particular reason but I can say that we know what was causing the main source of the problems previously so that won't happen without sufficient warning in the future.


Gary

[Mini-Geek]

Originally Posted by gd_barnes

... or that my ISP won't change my IP address for no particular reason ...

DHCP reservations only last for a certain time. Your ISP may have this set to a very long time, but either way the ISP will change your IP eventually. You can check when the DHCP address expires if you plug a Windows PC into it and run ipconfig /all from the command line, (look for Lease Expires) but that would reset the IP again...or maybe somewhere in your router's settings it can be viewed without resetting anything.

[mdettweiler]

Originally Posted by Mini-Geek

DHCP reservations only last for a certain time. Your ISP may have this set to a very long time, but either way the ISP will change your IP eventually. You can check when the DHCP address expires if you plug a Windows PC into it and run ipconfig /all from the command line, (look for Lease Expires) but that would reset the IP again...or maybe somewhere in your router's settings it can be viewed without resetting anything.

Well, if the computer (or, in this case, router) stays in (relatively) constant contact with the DHCP server, then based on my experience the DHCP server will simply let it keep its current IP. Case in point: once I had a computer on my private network that connected to my wireless router (which has a lease time of 24 hours) and picked up an IP of 10.0.0.3, since 10.0.0.2 was already taken at the time. (10.0.0.1 is the router.) That computer stayed on for a while, and even quite a while later it still had 10.0.0.3, long after 10.0.0.2 was freed up. In fact, even if I turned the computer off for a while and then back on again, it would still generally be re-assigned 10.0.0.3 as long as that IP hadn't already been given out to some other client.

Moral of the story: when a DHCP lease time expires, you'll usually get the same IP back, unless someone else was assigned it while your computer was off (and if it wasn't off and the lease simply expired while it was on, it will almost definitely get the same one back). That's why I've been able to keep the same public IP for more than a year even though my ISP uses DHCP--I've never had the router off for more than a few hours at max during that time, and my neighborhood is a somewhat rural area, so my subnet isn't quite as busy (hence less likelihood of my IP being reassigned in, say, the few hours while my router's off during a power outage) as one like Gary's might be, where he usually gets a new IP every time he power-cycles his router.

[Mini-Geek]

Hm that could be, but it's also very possible (I'd think so, anyway) that Gary's ISP's DHCP server and/or Gary's router works differently than yours and does in fact reset every time he power-cycles, whether anyone else gets a new IP in that time or not.

[gd_barnes]

I'm going to have to turn my wireless router off and back on.

I've avoided doing that for about a week now even though my laptop wouldn't connect. I had been connecting through some neighbor's unsecured network. (lol) Now I have my kids and theirs won't connect either. The unsecured network doesn't have a very good signal so is a nuisance to keep using.

Please check any of your machines connected to ports GB4000 and 8000 within about an hour. I'm assuming that my IP address will change.


Gary

[MyDogBuster]

Please check any of your machines connected to ports GB4000 and 8000 within about an hour. I'm assuming that my IP address will change.

No problems on my end. The more I "turn off" in Windows, the better things run.

[Flatlander]

Originally Posted by gd_barnes

... I had been connecting through some neighbor's unsecured network. (lol) ...
Gary

Have you tried installing sr2sieve on their PCs?

[MyDogBuster]

Have you tried installing sr2sieve on their PCs?

321*2^3904679785-1 is prime found by Gary's neighbor at 15:45 CST

1,175,425,742 digits submitted

[gd_barnes]

lol

It was only my wireless laptop that was connected to the neighbor's IP. All of my other machines are wired.


Gary