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Changing Hosts and IPs

Do you research used IPs?

         

stever

9:29 am on Oct 10, 2003 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



So, you've decided to change the supplier of your hosting services and you are getting new IPs. Two questions.

Are there such things as new (e.g. virgin) IPs without a history?

If you are being offered retreaded IPs, how do you research them for possible past history? (I'm aware of mail spam databases but am more concerned about previous SE penalties.)

claus

9:42 am on Oct 10, 2003 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



Virgin IPs would be rare these days. As for researching them, the first step would be asking the hosting company i guess.

I think - i have no evidence to back this up - that a sleeping period for the IP would reduce or partially eliminate problems. Partially only, as some webmasters seem to ban around the clock and never get those bans lifted.

Search engines, otoh, have a more vital interest in lifting bans that are no longer necessary. New clean sites may rise on that IP that was previously used for something else.

/claus

stever

9:48 am on Oct 10, 2003 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



the first step would be asking the hosting company i guess

Yes, I was heading in this direction, but, OTOH, they are hardly likely to tell you that it was used by an offshore pills network that they had to get rid of...

Something like a wayback machine for IPs?

seindal

12:39 pm on Oct 10, 2003 (gmt 0)

10+ Year Member



There might have been hundreds of sites on any single IP, if it has been used for virtual hosting.

I don't think there are any real issues with using a recycled IP. It happens all the time. The only minor problem is that you might initially get traffic intended for the previous users of the IP, but that should never be for more than a few days. This is due to the way the domain name servers cache results.

René.

claus

1:04 pm on Oct 10, 2003 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



>> wayback machine for IPs?

I dont think it exists. Would be nice though - it gets even more relevant as time goes by.

/claus

bakedjake

3:51 pm on Oct 10, 2003 (gmt 0)

WebmasterWorld Administrator 10+ Year Member Top Contributors Of The Month



Check Google groups, specifcally the net-admin groups. Just to see if it was a problem in the past.

No way to investigate SE penalties without contacting the previous owner, I would think. You could always try that.

If you're big enough, you could get new space allocated to you from ARIN, but we're talking service-provider size at that point.

seindal

4:08 pm on Oct 10, 2003 (gmt 0)

10+ Year Member



Are there SEs that mete out punishments based on IP? I've never heard of it. It would be fairly random. Penalties are attached to domains, but to IPs?

stever

4:09 pm on Oct 10, 2003 (gmt 0)

WebmasterWorld Senior Member 10+ Year Member



Yeah, we were offered a couple that were on a spam list so that's what started ringing alarm bells...

As far as any SE stuff goes, I realise you can't tell now, but I'd be happier knowing who the former owner was and having a sniff around their present IP.

seindal, see various discussions about inktomi and other older search engines here, as well as the debates about separate IPs for domains. Some people are convinced it happens/happened.

seindal

4:25 pm on Oct 10, 2003 (gmt 0)

10+ Year Member



Yeah, we were offered a couple that were on a spam list so that's what started ringing alarm bells...

That's another issue, spam, but it is easy to check by querying the most common RBLs. I'd keep far away from any provider that has IPs blacklisted. Your servers IP could easily be blacklisted after you have started using it. Some lists block entire IP-blocks.

seindal, see various discussions about inktomi and other older search engines here, as well as the debates about separate IPs for domains. Some people are convinced it happens/happened.

I think an SE that penalises IPs will soon be in trouble, mostly due to virtual hosting. It would risk hitting thousands of innocent sites. I have never heard of any of the current major SEs that does that.

bakedjake

4:30 pm on Oct 10, 2003 (gmt 0)

WebmasterWorld Administrator 10+ Year Member Top Contributors Of The Month



It would risk hitting thousands of innocent sites

Or guilty... ;-)

Email server operators have taken to doing this (they did not do this outright). No reason to think that search engines couldn't go down this path, although I'm not convinced that they will.

I thought that ARIN was working on keeping a history of allocations with their SWIP (IP adresss allocation) tools. I'm not sure of recent progress. And that would only help North America, and the other regions served by ARIN.

seindal

4:50 pm on Oct 10, 2003 (gmt 0)

10+ Year Member



It will be very hard to keep track of the history of allocation of individual IPs, since they are parceled out repeatedly in still smaller blocks, and the actual allocation of an IP takes place within the smallest unit, which can be any small company, school, institution, whatever. The lowest level of authority is not obliged in any way to communicate their choice to anybody, except via their name servers. The DNS is way too distributed for any such centralised collection of information.

bakedjake

4:57 pm on Oct 10, 2003 (gmt 0)

WebmasterWorld Administrator 10+ Year Member Top Contributors Of The Month



The lowest level of authority is not obliged in any way to communicate their choice to anybody

Not true. Providers are required to SWIP /29 (8 IP address) blocks or bigger. They don't always do this, but they certainly are obliged to do so per ARIN's guidelines. Most providers are pretty good about this, but some aren't.

Anything /30 (4 IP addresses) or smaller are /generally/ not used for hosting. If ARIN developed the history, we'd have a mostly accurate way to check previous ownership.