U

Visitor

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3 Messages

Fri, May 14, 2021 7:24 PM

1and1-data.host

I believe the DNS is blocking this site. I am unable to reach it. When I type in it's IP address I reach it fine. Obviously I prefer to use the DNS entry because the IP address can change. How do I talk to someone to determine why I am unable to reach this address? There may be other reasons for blocking it, and I'd like it to be unblocked.

The topic is File Transfer, but the only available topics are email and home network? Is XFinity a joke? Do you not realize the Pandemic has left many of us working from home? 

Responses

Again

Expert

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25.8K Messages

1 m ago

@user_0c9968 

Are you able to get to 1and1.com?  If so, are you able to sign in from there?  If you're not able to reach the site have you contacted 1and1?  If so, did they say Comcast is blocking you from reaching them?  I'd be surprised if Comcast is blocking you.

And FWIW, Comcast/Xfinity is not a joke, and this should have been posted in Customer Service, not Email, so it will be moved to Customer Service.

Visitor

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3 Messages

I spent an hour with IONOS today trying to figure out why I couldn't use the SFTP. We check to make sure my IP4 and IP6 addresses were not blocked. We checked to see if someone not on an Xfinity network could log in. We check to make sure that my password was what I thought it was. All of these came back as expected. Everything was good. However I still could not get into the server. Then I asked them for the direct IP address of the server and tried the same operation and it worked. This means it is Xfinity my ISP. It narrows down pretty quickly to the domain name getting turned into an IP address. It's clearly not working. Xfinity blocks lots of things. They even blocked certain ports like email. They are not blocking ports 21 or 22. 22 is also important for secure TTY which I also need.

I went to customer service first and there is only a bot to communicate with and the bot has no interest in dealing with technical issues. It's clearly set up for people who are concerned about their sports channels or their bills. There's no way to actually interact with the bot in a way that is meaningful for technical problem.

Again

Expert

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25.8K Messages

1 m ago

You might want to call Comcast's CSA (Customer Security Assurance).  They may be able to help you with some troubleshooting.  Their phone number is (888) 565-4329. 

BruceW

Gold Problem Solver

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22.4K Messages

1 m ago

Is "1and1-data.host" the complete hostname? https://www.ionos.ca/help/hosting/setting-up-and-managing-ftp-access/connection-data-for-secure-ftp/ seems to suggest that it is only partial. I cannot find any DNS server which resolves that name.

Visitor

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3 Messages

There is a sub-domain name but it contains my private username.  DNS should only need the domain name, no?

Official Employee

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214 Messages

Hey @user_0c9968. Have your tried to flush the DNS information? The first time you visit a website, the DNS information is cached. To quickly access the site, the computer checks the cached information. If the website's DNS information has been changed this will cause problems accessing the site. Flushing DNS will force the computer to find new DNS information for the site. Here are some quick instructions to perform this task:

 

How to Flush DNS For Windows

  1. Right-click Command Prompt and select Run as Administrator or right-click the Start Menu, then select 'command prompt (admin)'
  2. Type ipconfig /flushdns
  3. Press the Enter key

Note: Sometimes when flushing, TCP/IP does not automatically refresh the DNS table. In this situation, type ipconfig /registerdns at the command prompt. That will refresh all DHCP leases and re-register DNS names.

How to Flush DNS For Mac

To flush the DNS on a computer running Mac OS X, the user must access Terminal, the command line for Mac OS X. To open Terminal:

  • Go to File > New Finder Window
  • In the new Finder window, navigate to Applications > Utilities > Terminal and double-click on the Terminal application to launch
Depending on which version of Mac OS X the computer is running, launch Terminal and enter the following command:
  • Mac OS 10.7 through Mac OS 10.11: sudo killall -HUP mDNSResponder
  • Mac OS 10.6: sudo dscacheutil -flushcache
  • Mac OS 10.5: dscacheutil -flushcache
  • Mac OS 10.4: lookupd -flushcache

 

 

BruceW

Gold Problem Solver

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22.4K Messages

1 m ago

...  DNS should only need the domain name, no?

It depends how the site is configured, so sometimes yes and sometimes no. In this case the full hostname appears to be needed. As stated, I can find no DNS which resolves "1and1-data.host". Not Comcast, or Level3, or Google, or Cloudfare, or any others.

BruceW

Gold Problem Solver

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22.4K Messages

1 m ago

@ComcastThomasF : The image you tried to post yesterday references https://bitly.com/2SRix6R, which points to https://einstein360a.cable.comcast.com/proxy/assets/km/aem/comcast/residential/billing/image/HOW6249_image001.gif. But the server at "einstein360a.cable.comcast.com" is not accessible to customers, so the image isn't visible to us:

C>nslookup einstein360a.cable.comcast.com 75.75.75.75
Server:  cdns01.comcast.net
Address:  75.75.75.75
*** cdns01.comcast.net can't find einstein360a.cable.comcast.com: Non-existent domain

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