Hoperf radio modules and DNS

[markp]

I've just designed in a radio module RFM12B-433-S1 from hoperf
(www.hoperf.com). Now I cannot access the hoperf website. In fact
DNS doesn't resolve the name (either with my DNS servers or
online nslookup).

Should I be worried? This is a Chinese company and these modules seem to be
very popular. They might be changing servers I guess and Christmas is
probably a good time to do it, would this normally result in no DNS lookup
at all while they do it?

Mark.

 

[markp]

I've just designed in a radio module RFM12B-433-S1 from hoperf

I get an error message too, but:
# host www.hoperf.com
# Host www.hoperf.com not found: 3(NXDOMAIN)

# host hoperf.com
hoperf.com has address 121.199.253.175
hoperf.com mail is handled by 10 mx.hoperf.com.

So, typing 121.199.253.175 gets a Chinese site.
With very little info.

Thanks for confirming. Yes, I actually found that site too while doing a
lookup, some wierd Chinese homepage! I'm hoping they have just changed
servers and DNS is currently broken, and that they haven't gone out of
business. This radio module is the best and cheapest I've found, it's great.
Fingers crossed...

Mark.

 

[markp]

I've just designed in a radio module RFM12B-433-S1 from hoperf
(www.hoperf.com). Now I cannot access the hoperf website. In fact
DNS doesn't resolve the name (either with my DNS servers or
online nslookup).

Should I be worried? This is a Chinese company and these modules seem to
be
very popular. They might be changing servers I guess and Christmas is
probably a good time to do it, would this normally result in no DNS lookup
at all while they do it?

Mark.

Phew, it's back. Funnily none of the online nslookup services could find it
either using their own servers, but at least my DNS servers can again. Maybe
an outage at their hosting company (?).

Mark.

 

[markp]

The same happens with my site when I switch the server off, as the name
server,
the authoritive one, that tells everybody where my site is (its IP
address),
also runs on this same server.
That is the way DNS can work, not everybody needs an ISP to run a 'named'.
A bit strange that hoperf.com (without the www) was resolved though.
Could also be their named was victim of some attack.
BTW 'named' is a program.

Interesting. Remember hoperf.com was resolved to 121.199.253.175, and
entering that into a browser got some wierd homepage? Well it is still
resolved to that address, but if you type http://hoperf.com now into your
browser now you get the proper site, which is the same as
http://www.hoperf.com . However, www.hoperf.com resolves to 122.225.96.220.
I assume this site has two IPs, one with the www and one without.

Mark.