Exchange 2003 - Authentication problem

[pooley]

My exchange box has suddenly started playing up.

It works fine through Outlook and Internally using OWA

But when i try to access it externaly via www.domainname\exchange it wont authenticate any longer.

it was wrking for about 2 weeks but now it gives me 3 attempts at entering my username/password and then goes to "Error Access is Denied"

I havent changed anything on the server ??

Cheers once again

Si

[Geoff]

Is your ISP implementing any filtering?

[Jake]

A daft question I know..but all the services running?

[Disease]

Aye, check with your isp or firewall provider, make sure that they have not closed any ports by accident. Does happen sometimes.

[Alex]

can be problematic through proxies sometimes

in the authentication options in IIS check clear text as well as windows auth - see if that works. (turn back off afterwards)

You could also enable forms based authentication

[pooley]

Local council supply fibre link via proxy.

Will enquire thriugh them if they have been messing around with the pix config.

@Alex - will try those too