system
1
I’ve just upgraded to the latest avast version and now I can’t access my Linksys WAG54G Switch / Router.
I’ve gone to the web shield setup and put the IP address in as an exception but I still get :
HTTP 504 - Gateway timeout
avast! Web Proxy
When the server, while acting as a gateway or proxy, contacted the upstream content server, it did not receive a timely response.
GET http://192.168.1.2/
I’ve searched the forum but can’t seem to find an answer to the problem.
Help … please 
Vlk
2
Would you be willing to do a small experiment? Are you computer proficient (do you know what a command line is)? 
Thanks
Vlk
Vlk
4
Good. Let’s try the following
- start cmd.exe (the command line)
- type
telnet 192.168.1.2 80
- type
GET / HTTP/1.0
- some data will likely be returned. Scroll to the beginning and post e.g. the first 20 lines.
Thanks
Vlk
system
5
When I try to telnet to the switch I get :
Could not open connection to the host, on port 80: Connect failed.
I can ping the switch but I don’t know if telnet is refused through avast or at the switch itself.
system
6
I removed those IP entries from the Web Shield and telnet let me in but I just got a blank screen until I forced the disconnection.
After I hit enter and esc a few times this is what I got :
There is a problem with the page you are trying to reach a
nd it cannot be displayed. The request could not be understood due to malformed
syntax.
Please try the following:
- Click the Refresh button to try again.
- If you believe you should be able to view this directory o
r page,
please contact the Web site administrator by using the e
-mail address or
phone number listed on the Web site home page.
HTTP 400 - Bad Request.
avast! Web Prox
y
<CODE>
Connection to host lost.
Vlk
7
Connect failed? That’s odd… When accessing the switch from the browser, do you specify a port number in the address bar? or just plain http://192.168.1.2 ??
BTW I forgot to say that you should do the experiments with the avast WebShield provider stopped. 
Thanks
Vlk
system
8
I stopped the webshield and I’m back to that original message - connect failed.
When I access it through the browser it just plain old http://192.168.1.2
Vlk
9
And it IS working in the browser? :o
Maybe you’re using a firewall and it’s blocking telnet’s access?
system
10
It’s not working through the browser at all. If I have the web shield running I get “The page cannot be displayed” if Web Shield is off I get “Connection refused”.
The only software firewall I have is the windows one and it’s off. The Linksys has a hardware firewall but I could access it fine before the avast upgrade.
I’m fairly sure it’s not spyware as I regularly run Adaware, Spybot, Microsoft AntiSpyware and a couple of online checkers including Pest Patrol.
Vlk
11
Wll you could try to uninstall avast but I can’t imagine which other part of it (besides the Web Shield) could be blocking the access… :-\
system
12
The uninstall / reinstall seems to have done the trick. Why is not obvious but it’s working so …
Vlk
13
Reinstall of avast solved the problem?? Strange indeed… :-[
system
14
I’ll amend my last post. The reinstall worked for a short period but the problems are back again.
This time not only can I not connect to the net but I can’t download mail or update the virus defs.
I’ve uninstalled again but I’m not reinstalling. Can I get a copy of 4.5 ?? I had no problems while it was installed.