Web shield blocking access to 192.168.1.100, even with exclusions

Greetings,

I am using a Windows 10 laptop to try and configure this device:
https://www.synaccess-net.com/np-02b/

The way it is supposed to work is the device comes preloaded as
192.168.1.100
255.255.0.0
192.168.1.1

and you connect to it directly with a crossover cable and set your computer to:
192.168.1.150 (or whatever host portion you want)
255.255.0.0
192.168.1.1

Typing 192.168.1.100 loads a web interface to control the device.

On my laptop, this only works with Avast Web Shield disabled.
I get the login prompt for the device, but the web interface doesn’t load.

I added the following exclusions to both the general software settings and the web shield settings
http://192.168.1.100*
https://192.168.1.100*

yet I still have the same issue. The web interface won’t load.

Any other thoughts what I can try?

What exact version of avast ?
What exact OS/SP ?
Any other security (related) software installed ? (or was there)
Already performed a repair of avast ?
Already performed a clean installation of avast ?

  • It is Avast Free 17.4.2294 (build 17.4.3482.0). Virus definitions 170525-2
  • Windows 10 Home Version 1607 Build 14393.1198
  • It’s always been only Avast. Even Windows Firewall is disabled

Do you really think a repair or fresh install of Avast could resolve this particular issue? Or was your reply a canned reply? :slight_smile:

A repair or true clean install can solve the problem.

Why do you have the windows firewall disabled ?
Doe you have a hardware or other software firewall installed ?

Ok I will try a repair and then a clean install if the repair doesn’t work.
Any further suggestions if neither work?

Windows Firewall was blocking something unrelated to this so I disabled it indefinitely.
No there’s no other security software on this computer and there never was.
Hardware-wise, this current setup (direct crossover cable connection) wouldn’t even go through a physical firewall even if we had one (which we don’t).

Thank you!

Well, since Avast Free doesn’t have a firewall, your only software firewall would be Windows Firewall. The other firewall you would have would be the hardware firewall in your router.

So you are running a hardware firewall but no software firewall.

What was Windows firewall blocking?

No I am not running ANY firewall, hardware or software.
I was just stating that when I am plugged directly into this device with a crossover cable, that the computer isn’t even on a network. So there’s no firewall at all.

Windows firewall was blocking this computer serving out something completely unrelated to this topic. I could turn it back on, but I don’t think that would help with my current Avast problem??

I’ve to comment this is not the usual setup. Might be why I assumed wrongly.

Any particular reason for running only with a crossover cable?

I’m afraid I am not sure what you mean. Are you asking me a question here?

Any particular reason for running only with a crossover cable?
That is what this device requires to communicate. That is actually pretty normal from an IT perspective when connecting two devices directly with a network cable; needing a crossover cable is common. But the physical communication between my laptop and the device isn't the issue. They see each other just fine. The issue is that I cannot get to the web interface of the device unless I turn off the Avast Web Shield.

Got it.

Eddy’s advice to either Repair the avast installation or do a clean install would be recommended. Reason for that is because WebShield needed an Avast EmUpdate.exe run to resolve exactly the same symptoms/issues you are reporting earlier in the month, and a repair and/or clean install is the fastest way to resolve.

Repair Avast:
Control Panel> Program and Features (Add/remove program)>Select Avast> Select Repair. Reboot when completed
https://www.avast.com/faq.php?article=AVKB204
If Repair doesn’t fix the problem, try the following:
Clean Install of Avast:
https://goo.gl/4Ptzkf

Thanks, guys! A repair didn’t work. I will try the clean install as instructed and let you know if that does the trick.

No I am not running ANY firewall, hardware or software.
Why installing avast (or any other av for that matter), and at the same time putting your system at risk ? That is like putting locks on your front door and leaving the back door and all windows open.
That is actually pretty normal from an IT perspective when connecting two devices directly with a network cable; needing a crossover cable is common.
Connecting two devices with a x-over cable is not common and not normal anymore for many years.

If arguing the point would only solve it. :frowning:

@eddy

I appreciate you trying to help, but I’ve been doing IT for 17+ years, so I don’t need a lecture on the pros of using a Firewall :slight_smile:

Regardless of how common crossover cables are, it’s what the manufacturer says we need, so I am using it.
The type of cable I am using is irrelevant; because as I previously stated, as soon as I turn off the Avast Web Shield, the problems all go away.

35+ years IT for me :wink:

I believe it. We don’t have to turn this into a pissing contest :-*

@ quastjoe
Sorry if I come to this party late, I have quickly skimmed what has been posted, but I could well have missed something. Excuse me if I have missed something and ask about it again.

Does this synaccess functionality use a program to control any traffic over the browser connection ?

If so:

  1. I wonder if checking Web Shield > Customise > Main Settings > now check the ‘Scan traffic from well-known browser processes only’ option.
    or
  2. You might consider the Web Shield > Customise > Exclusions > scroll down to the Processes to exclude - check that box and add any process involved in synaccess functionality.

David,

Thank you for the suggestions, but I don’t think either will help.

It isn’t a program that runs. It is a web interface that is hosted by the device itself over the LAN.

So we would just type in the IP in any browser to log into it and manage it.

OK, sorry about that.