Strange Limited Site Access Issue

Mr E

We're having a weird problem accessing some of our sites from within our office.

The bullet points:

- The sites won't load in our browser.
- If I ping any of them I get "Destination Port Unreachable" (not Destination Host Unreachable)
- The sites are hosted on hosting365
- We called H365, they say its not their problem, call Eircom.
- We called Eircom, they say its not their problem, call H365.
- We tried a different wireless modem (my home modem) - same issue (from the office - sites load fine from home).
- My home modem is using OpenDNS, so its not an Eircom DNS issue.
- I did ipconfig release, renew and flushdns on our PDC.
- I tried a bunch of sites listed here and they all work.

Any ideas what else I can try?

bhickey

It's hard to say without knowing what sites you're talking about.

Mr E

One of the sites is www.spinnakerpro.com

It seems to be accessible from anywhere on the outside.

Dermot Illogical

If non-standard ports are being used, are they filtered at your firewall?

Mr E

To eliminate as many variables as possible, we wired a laptop directly into the modem. We've tried turning the firewall off (on the modem).

Dermot Illogical

How far do you get using traceroute?
And can you ping 82.195.146.32?

Mr E

Gets to step 10 on the tracert, and ends with this:

10 web8.hosting365.ie [82.195.146.32] reports: Destination protocol unreachable.

"Destination Port Unreachable" on that ping.

softdancomputer

Its this happening just on one PC, or on many?

Mr E

All PCs in the office (that are connected to the net through that router)

A couple of the sites are on web8.hosting365.ie, a couple are on web3.hosting365.ie.

davenewt

Have you tried different browsers? Reason I ask is we have a similarly odd thing within our office using IE - if you google our company, any links to our website within google are un-clickable, in IE.... yes, literally, the links show up as links but they do nothing. Other links on the same google results page still work fine.

Not wanting to steal the thread but if anyone has any thoughts on that one, I'd love to hear them!

I just use Firefox. It's the only option that keeps me sane

Mr E

Nope. If I can't even ping the site from the command line, then changing browser certainly won't help (I tried anyway, and it didn't work!)

softdancomputer

Its there any message when you try to load a site in browser?
Did you try to type web8.hosting365.ie in address bar; its anything loading?

corkcomp

i came across a similar issue yesterday. I flushed dns cache on the server and all PC's and re-registered and then set open dns as secondary dns server and all worked ok so im not sure which of the above steps actually resolved..

Mr E

softdancomputer wrote: »

Its there any message when you try to load a site in browser?
Did you try to type web8.hosting365.ie in address bar; its anything loading?

Same issue (can't ping either - destination port unreachable)

corkcomp wrote: »

i came across a similar issue yesterday. I flushed dns cache on the server and all PC's and re-registered and then set open dns as secondary dns server and all worked ok so im not sure which of the above steps actually resolved..

Tried releasing, flushing, renewing, changing to OpenDNS, nothing helped....

Snowbat

Mr E wrote: »

Gets to step 10 on the tracert, and ends with this:

10 web8.hosting365.ie [82.195.146.32] reports: Destination protocol unreachable.

That's with "tracert www.spinnakerpro.com'"? If yes, get back on to H365 and send them the trace because it's not an Eircom or DNS problem.

Do you have a static IP address from Eircom at the office? Maybe H365 poked holes in the server's firewall to allow your office IP address to access extra stuff but a misconfiguration is blocking normal service?

softdancomputer

Mr E wrote: »

Same issue (can't ping either - destination port unreachable)

Tried releasing, flushing, renewing, changing to OpenDNS, nothing helped....

Ping isnt necessary the best way of diagnose on the Internet, lots of sites block ICMP traffic.
Try to go to the site via a proxy (anonymizer.com) and see if its working

Dermot Illogical

softdancomputer wrote: »

Ping isnt necessary the best way of diagnose on the Internet, lots of sites block ICMP traffic.

Not in this case though.
ping www.spinnakerpro.com
PING www.spinnakerpro.com (82.195.146.32) 56(84) bytes of data.
64 bytes from web8.hosting365.ie (82.195.146.32): icmp_seq=1 ttl=54 time=33.3 ms