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DNS/FTP going crazy

S

Syringer

Lifer
We have an FTP that our clients use to upload files to, and right now we just switched from hostpc to knownhost, and we're checking every 30 minutes to access the FTP via its domain..

We'll ping ftp.domain.net and literally it'll switch from working to finely and connecting to the right IP, and then another time it'll give a could not connect error with in 15-20 minutes.

We have two ISPs we can connect to and that'll sporadically go up/down, and even with computers on the same router, on the same IP, one will see the domain when pinging it, and another computer will not.

Any idea what could be the issue?
 
On the "working" computer, ipconfig /flushdns then try to ping it again.

If it does not work after that, then DNS resolution is not working.
 
Using the ipconfig /flushdns command on the working computer will clear any stored DNS information on the computer and force it to ask the DNS server for an IP address for your FTP server. If it fails, then that confirms that DNS resolution for the address is not working properly. If the computer is still able to resolve an address after clearing the local DNS cache, then DNS server resolution IS working properly for that computer and additional troubleshooting is needed in order to determine why some computers work and others do not.
 
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