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Dns Propagation Help


ale
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I have been having a problem accessing my web site and email over the past week and a half. My email program reports that the email server cannot be found. My web browser (IE) states that either the web site is unavailable, DNS is not reachable, or the DNS does not have a listing for the website's domain. After a few days I can access my site and email. After a day of accessing my site, the problem repeats itself again without me doing anything obvious and then I cannot access my email and web site again. The only web site that this appears to happen with is mine. I can access everything else I try to access on the web.

 

The DNS propagation explanation made sense to me (although I really don't know what it is), but the problem keeps repeating itself every few days only on my web site.

 

I have been working with TCH technical support who have been very responsive. However, I am very confused by the issue and it is not resolved at this time. I would appreciate anyone's insight or help on where (or which forum) to post this message.

 

Based on the information from tech support, I have done the following:

 

From a DOS window, I typed tracert <mydomainname> and received the following: Unable to resolve target system name. Tech support indicated that this appeared to be a block at my end.

 

I was able to access the web page with a direct link (http://nnn.nn.nnn.nnn/~username). Tech support suggested that there was a propagation issue with my domain and I needed to wait.

 

From a DOS window, I then typed ipconfig /flushdns, rebooted, and still was not able to access the site. Tech support suggested waiting for DNS propagation.

 

I disabled my virus and firewall software and still was unable to access the site. I also reset my router to flush it. Tech support suggested that the issue could be with my ISP.

 

I contacted my ISP to ensure that they we not blocking anything. They were not blocking and were able to reach the site using the same server that my computer goes through.

Edited by ale
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Welcome to the forum ale :)

 

Without a domain name for us to try and access we would only be guessing. You can either post your domain name (as long as it is family friendly) or PM it to myself and I can see if I can access it from where I am.

 

Thanks for the quick replay.

My domain name is partners4success.net

The TCH status indicates that the server is up and running.

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I can reach your site from SW Ohio as well.

 

As Thomas said, have you tried connected directly through your modem vs. through the router?

 

If you can't get past your router you won't be able to access your site.

 

Thanks guys for your suggestion. I will try to connect through the router after I shut everything down today. If this is the problem, would this indicate that the router is going bad?

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Not necessarily. It could just be your router is not allowing name lookups (DNS) properly. Or the DNS servers your ISP is using is not updated to reflect your site.

 

But why just this one site? I am not knowledgable on DNS propagation, but I find it interesting it only happens to me with this site. (I still need to connect without my router.)

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Propagation explained:

Your domain registrar is the one responsible for publishing your domain name at the very first (called root) DNS level. When it is published, it is placed into a directory that is broadcast out to primary DNS servers around the world.

 

The primary DNS servers broadcast out to secondary DNS servers and so on and so forth.

 

The process is called propagation.

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Thomas & Bruce,

I am impressed that my site has been viewed from Sweden!

 

I bypassed my router tonight and had no luck, so it doesn't appear to be my router. I don't think it is my computer because none of the computers on the network can access my site.

 

I typed the address for hyperspin and found places as far away as the Netherlands and Australia, so this suggest to me that the domain regstrar is properly propagating. It seems that the next step for me is to talk to my ISP again. I can't understand why my ISP would not update just my site.

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New idea and I don´t know if it´s a good one (so others might disagree) but here goes... :)

 

If you have a friend or neighbor who uses the same isp, are they able to see your site?

I´m thinking that if it is a isp issue, others using same isp must have same problem, or atleast it´s a bigger chance that they have.

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I don't think it is my computer because none of the computers on the network can access my site.

 

Could you explain a little more about this statement please. What "network", is this your work or a "home" network? If its a local network like a home or office network than thats where the problem will be. Now why it would be blocking a single site is beyond me and you'll need to ask the network Admin if its a Office Network. If its a home network then you need to look at the router logs.

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Thanks for the suggestions. This is a home network, but last night I bypassed the router, went straight to the modem, and still had the problem, thereby eliminating the network (I think).

 

I was going to use Thomas's suggestion and call a friend who uses the same ISP and then call the ISP today, but my connection magically works today. I give it a few days to act up again (unnecessary pessimism?) and then I'll try Thomas's idea. It sounds feasible to me.

 

But I still can't figure out why it only happens with this one web site!?! (My refrigerator broke this weekend also - maybe there's a connection.)

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Unable to resolve target system name

 

What this is saying is that it cannot resolve the URL to an IP using the DNS server you have specified. Normally people assume its a problem with the domain but it could be with DNS server not being available. If the server is down or there are communication problems between you and the DNS server you will get this error.

 

When (if) it happens again you could change the DNS server you are using (usually this is your ISP's) and use one of the many public DNS servers out there. Go here for a list:

h_tp://www.tech-faq.com/public-dns-servers.shtml

 

If this does the same thing then the problem is within your home network.

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My connection has been working for about a day and a half now. I appreciate everyone's help and ideas. I have a better understanding of what this means and more prepared to talk to my ISP if it happens again. Also, thanks to Madmanmcp for the link. If I have this problem again, I can use one of the public servers to see if I can get through.

 

I wish I could contribute to this forum to help others but this isn't my strength. If you guys have a question about photography or organizational culture, feel free to contact me!

 

Thanks again.

Al

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The ISP didn't help. They could see the site. I ended up reformating my computers and restablishing my network. This was a lot of work and it will take weeks to get things back to normal, but it had to be done. So far, things are working alright with access to my site.

I still am intrigued that it was only my site that I could not access...

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Did you happen to look at the hosts file on your machines? I just wonder if something was in there causing you problems.

 

I thought about the hosts files earlier but eliminated that because it was an intermitant problem and it would work sometimes. A change to the hosts file would give the same problem everytime. It would also mean that all the PC's had the same change to the hosts files which is hard to believe.

 

Formating and reinstalling all the PC's is overkill IMHO but if it works...

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Where would I find the host files?

I agree that reformatting was overkill, but it was one of those diminishing return things that you read about all the time - project due, things not working, desperation.

At least the computers run faster now.

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The host file would have been something good to look at before I reformatted the computers. I read about the files on Wikipedia after your post – there is some interesting information there (especially if there are any beginners reading this thread). I was suspecting a virus or malware on my network but discounted that because I am rigorous about virus protection software. It seems that the host file could have blocked me from access my site. Once again, why only my site I have no idea, and why intermittently also is a mystery. Considering I have been running longer since I reformatted than any recent period, and all the feedback I got from everyone, I have to suspect it was my computers.

 

Since I am an optimist, my computers are running faster. They needed the cleaning (and the project is complete!).

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Unlucky for me, I get a chance to see if the host file is causing my problem because it is happening again. Once again, it is only on my Total Choice site. In addition to the comments, my host file has two lines. The first one is a numeric address (nnn.n.n.n, where n is a number). The second line is ::1. If safe, I’ll post the numeric address, let me know if necessary (don’t know if this should be a “secret” number from hackers).

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If safe, I’ll post the numeric address, let me know if necessary (don’t know if this should be a “secret” number from hackers).

 

There's no secret in there. It just a way to redirect to a different location. See if this site helps you understand what you are looking at. And the contents of the file is just text and safe to post here.

 

h_tp://vlaurie.com/computers2/Articles/hosts.htm

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I checked my host file and compared it to the link from Madmanmcp. My file matched what the link had, so there was nothing wrong with the file.

 

For those who may be following this thread, I have received some tips through private message that I would like to post, especially if anyone else may be having this problem. I did the following (Microsoft Tech Support article links are in parenthesis)

PING

NSLOOKUP (NSLOOKUP)

 

_____________________________________________

The private message tip concluded:

The results of the nslookup helps a lot. What it tells me is that the DNS server that your computer is looking up addresses (ns1.myeastern.com) is screwed up. It didn't have an entry for your site earlier in the day, then it had one later. I think that is one of your ISP's servers. If it is, you should contact your ISP again and tell them the results of the nslookup when you couldn't access your site. They should be able to understand the problem from that and fix their server or tell you different servers to use for DNS. If your ISP still isn't any help, or you have questions, let me know.

 

_____________________________________________

TCH-Bruce also replied in private message (because I forwarded the information to him also):

What that is telling you is your DNS server (the one you connect to) can't find your domains server. See this Microsoft article.

 

h_tps://www.microsoft.com.nsatc.net/resourc...p.mspx?mfr=true

 

I don't use my ISP's domain servers, I use an external set of name servers which seem to work better. I use OpenDNS to perform my DNS lookups. Check them out. They have instructions on how to modify your settings to use their servers. If your ISP allows you to use external DNS servers this will probably solve your issues.

 

_____________________________________________

I will use this information when I call my ISP the next time I have this problem.

 

_____________________________________________

The suggestion and results of what I did are as follows:

I saw your forum posting about having trouble accessing your TCH web site. I wasn't sure if anyone had suggested the following troubleshooting steps... (I am sending this as a PM so that you don't have to post the results to the entire forum.)

PING

1) From a DOS prompt, type "ping partners4success.net" - what happens?

2) Then type "ping www.partners4success.net" - what happens?

3) Then type "ping 209.51.158.250" - what happens?

 

NSLOOKUP

4) From a DOS prompt, type "nslookup" then at the > prompt, type "partners4success.net" - what happens?

 

BROWSER

5) In your browser, go to "http://209.51.158.250/~<your cpanel account name> - what happens?

I followed the instructions, both while I was having the problems and after I had access to my website.

PING

When I could not access my web site, the ping returned:

Ping request could not find host partners4success.net. Please check the name and

try again.

When I could access my web site, ping returned:

Pinging partners4success.net [209.51.158.250] with 32 bytes of data:

Reply from 209.51.158.250: bytes=32 time=52ms TTL=45

Reply from 209.51.158.250: bytes=32 time=52ms TTL=45

Reply from 209.51.158.250: bytes=32 time=56ms TTL=45

Reply from 209.51.158.250: bytes=32 time=52ms TTL=45

Ping statistics for 209.51.158.250:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 52ms, Maximum = 56ms, Average = 53ms

NSLOOKUP

When I could not access my web site, NSLOOKUP returned:

C:\Users\Al>nslookup

Default Server: ns1.myeastern.com

Address: 66.212.192.40:53

 

> partners4success.net

Server: ns1.myeastern.com

Address: 66.212.192.40:53

*** ns1.myeastern.com can't find partners4success.net: Server failed

When I could access my web site, NSLOOKUP returned:

C:\Users\Al>nslookup

Default Server: ns1.myeastern.com

Address: 66.212.192.40:53

 

> partners4success.net

Server: ns1.myeastern.com

Address: 66.212.192.40:53

Non-authoritative answer:

Name: partners4success.net

Address: 209.51.158.250

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  • 3 weeks later...

Well Bruce, I really haven't sorted it out yet. The problem has occurred twice since then, including tonight. I called the ISP and spent a little over an hour on the phone with them. They were having problems access the web site, but they checked their blocked ports to make sure that they weren't blocking my site. They also reviewed this forum thread so they could see what we have done.

 

They could not find a problem, although they promised to look into it some more. There was one interesting thing they noted, however. My ISP had bought out the local one about two years ago. When I had done the nslookup as suggested in the forum, it returned the name of the old company (myeastern). The ISP thought that was interesting also.

 

Also, since I talked to you last, I had bought a new computer with Vista. The problem occurs on both my Vista and XP machines.

 

This is an odd problem.

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Thanks for the idea, Andy. The DNS servers were pointing to NS3.TOTALCHOICENETWORKS.COM & NS4... I will change them and see what happens. The domain name people say this takes 24 to 36 hours to go throughout the internet, so we'll wait and see how this works.

I appreciate your help.

Al

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Andy,

I got access to my web site about an hour after changing nameservers. This could be coincidence, could be the problem. I have been running five days now with no problem. One month and I might cautiously declare success.

Thanks for the advice to everyone.

Al

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  • 1 month later...

I asked tech earlier today how to find out when my domain names have propagated over to TCH, he told me to get into DOS and do the following:

telnet domain.com 26

 

When I do that I only get this:

220-danuta.tchmachines.com ESMTP Exim 4.68 #1 Thu, 14 Feb 2008 23:04:10 -0500 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.

 

He told me that I should see:

Trying xxx.xx.xx.xx...

Connected to domain.com (xxx.xx.xx.xx).

Escape character is '^]'.

220-danuta.tchmachines.com ESMTP Exim 4.68 #1 Thu, 14 Feb 2008 23:04:10 -0500 220-We do not authorize the use of this system to transport unsolicited, 220 and/or bulk e-mail.

 

If you are getting "Trying 70.47.92.70..." , it is yet to propagate to our server.

 

 

Why can't I see the ip address?

 

I hope it's not bad of me to add to this thread, but since it said DNS Propagation help, I thought I'd add my query.

 

Thanks

Edited by TCH-Andy
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"danuta" is our server - so it's already propagated for you

 

Hmmm Alex said it hadn't yet, but that was a few hours ago. I can't log in to my mbstia site. Also I'm having a very hard time actually getting to the site, it takes forever to load that one. I seem to generally be locked out of my Joomla sites even tho I changed configuration.php to add in localhost instead of the IP I was previously using. I am sure I must have done something wrong.

 

I flushed as you said and I'm wondering if I should do anything else? Shut off and restart the router? Perhaps shut down and restart my PC?

 

Thanks Andy!

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on the mbstia site, it looks as if you have some redirects looping round .... I'll have a quick look for you where that is.

 

Oh, check the .htaccess.. i had to do some redirects b/c joomla has a weird problem.

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  • 1 year later...

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