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  • ups.com points to 153.2.224.50 while www.ups.comOpens a new window AND its aliases points to 104.123.205.217 IP address.

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  • Welcome to the Community.

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  • I am not able to replicate your issue, I can type in ups.com and get redirected to www.ups.comOpens a new window here in the UK

    TheMortiestMorty wrote:

    The problem appears to exist on the DNS side, i.e. the DNS lookup for "ups.com" returns completely nonsensical results.

    They look perfectly fine to me.

    ups.com is likely directing to ups's main IP (New Jersey) and the one starting www. is probably pointing to a CDN. Many global companies will do this so they can redirect to local servers, rather than a specific geo-location.

    No point sending me to their public IP in USA if I'm looking for ups in the UK.

    For example on your www lookup, you get 104.123.205.217 (California, San Jose), but I get 23.43.33.138 (Manchester, England)

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  • Yea, that's some DNS entry they have messed up apparently. On MXToolbox it shows the same information you posted. @ goes to the IP (which apparently is nothing) and the www.ups.comOpens a new window goes to a long series of cnames which eventually takes you to akamai and then to some IP that goes to their website. 

    They're inconsistent at the least, wrong at the worst. 

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  • Are you sure you get an actual redirect instead of, say, your browser simply adding the "www" for you? 

    Safari is known to do this, for one example. So, in Safari on a MacBook the site seems to "work", while in Chrome on the same machine it doesn't.

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  • Someone responsible for running that doesn't understand how this works.

    DNS servers and lookups don't speak "web protocols" such as HTTP.

    What needs to happen that isn't happening is that at the IP addresses for UPS.com, there has to be a web server listen()-ing on port 80 (isn't) and port 443 (is).  Currently port 80 isn't connect()-ing, but port 443 is.     Port 443 is timing out.  No secure connection is negotiated and no 301 or 302 is coming out.

    Both ports 80 and 443 has to accept()-ing the connection it sees, understand that it is HTTP and for "ups.com" and issue a 30x response that says "https://www.ups.com"Opens a new window.   

    That goes back to your browser client and it proceeds with a DNS lookup for www.ups.comOpens a new window which you get the results you're seeing in the lookups. and follows that to the cloud instances for the site.    

    Standard RFC-based Authoritative DNS servers don't allow a CNAME record type for ups.com (at the apex or root of a domain, subdomains are fine), only an IP address can go there.

    A vendor or documentation from them who tells you to make DNS record type such as "ANAME", "DNAME" or "ALIAS" has extended their name servers' abilities to understand these record types.   

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