Error: Internet Explorer cannot display the webpage

[gocreative]

Today I've had two CMSMS websites display this error message for some clients who are using Internet Explorer:

'Internet Explorer cannot display the webpage'

I have tested both websites in IE5.5, 6, 7, 8 and 9 without any issue. There is no issue in any other browser for me, either. The debug.log file doesn't list any errors or anything out of the ordinary.

Both websites are on the same shared hosting server and I have never had this issue before. I have not made any changes to one site for many weeks and the other for many months.

No other clients have ever reported this error, and I've never come across it either. One client has just told me that the error has disappeared, but the other is still experiencing the issue.

I found an old bug thread (http://forum.cmsmadesimple.org/viewtopic.php?t=19430) but that didn't help.

Below is my CMS information. Does anyone have any ideas on what might cause this? Just a temporary host issue perhaps?

-----

Cms Version: 1.10.3

Installed Modules:

CMSMailer: 2.0.2
FileManager: 1.2.0
MenuManager: 1.7.7
Packages: 1.1
ModuleManager: 1.5.3
News: 2.12.3
Search: 1.7
ThemeManager: 1.1.4
AceEditor: 0.2.4
AdvancedContent: 0.9.3
GBFilePicker: 1.3.2
FormBuilder: 0.7.2
Captcha: 0.4.5
CGExtensions: 1.28.2
CGSimpleSmarty: 1.5
CGSmartImage: 1.8.2
Gallery: 1.5.3
TinyMCE: 2.9.6
SEOTools2: 1.0.10
ListIt2: 1.1
EventsListing: 1.1


Config Information:

php_memory_limit:
process_whole_template: false
output_compression: false
max_upload_size: 5000000
default_upload_permission: 664
url_rewriting: mod_rewrite
page_extension:
query_var: page
image_manipulation_prog: GD
auto_alias_content: true
locale:
default_encoding: utf-8
admin_encoding: utf-8
set_names: true


Php Information:

phpversion: 5.2.17-pl0-gentoo
md5_function: On (True)
gd_version: 2
tempnam_function: On (True)
magic_quotes_runtime: Off (False)
E_STRICT: 0
memory_limit: 128M
max_execution_time: 30
output_buffering: 4096
safe_mode: Off (False)
file_uploads: On (True)
post_max_size: 6M
upload_max_filesize: 5M
session_save_path: No check because OS path
session_use_cookies: On (True)
xml_function: On (True)


Server Information:

Server Api: apache2handler
Server Db Type: MySQL (mysql)
Server Db Version: 5.1.61

[SimonJ]

It could be a DNS issue, are they using IPv6?

[gocreative]

Thanks for the suggestion. If by 'they' you mean the clients, I have no idea. My guess is it's a temporary server issue and won't come back, but I wanted to look into it anyway in case it's something more serious.

[SimonJ]

Actually I meant the web hosts, I am guessing this is going to happen a lot as they switch IPv6 on for testing and forget to keep IPv4 on as well.