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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: REDACTED on June 19, 2018, 05:33:32 PM

Title: connection not established in the update
Post by: REDACTED on June 19, 2018, 05:33:32 PM: Since May 18th, 2018, my free Avast's update has failed to establish connection. The Update Page always shows "connection not established" and "lastest update received" shows 2018/5/18. Avast fails to update automatically. Everyday I have to update the virus definition manally. I have tried to repair the software and reinstall it but I failed to fix the problem. Anyone can help me?
Title: Re: connection not established in the update
Post by: mchain on June 19, 2018, 06:39:17 PM: Sometimes we make changes to settings in Avast and then forget we made them. I know I've done that at times. (One time I meant to make program updates manual settings but made the virus settings manual too.)

See picture below for correct virus update settings and, if different, set to what you see below.

If your settings are correct, then reset your DNS settings to Google DNS, 8.8.8.8
Title: Re: connection not established in the update
Post by: REDACTED on June 19, 2018, 06:53:10 PM: Thanks for your reply. All the settings are correct. And reseting DNS does not help. The most strange thing is both the free avast on my two laptops show "connection not established". On May 20, I took one of my laptop back to my country in different time zone. It appears that since then, the avast on the laptop taken away from US showed "connection not established". When I came back, I found the avast on the other laptop left in the US but remaining shutting down also shows "connection not established". I checked the license on the two avasts. They are different but I remember I used the same email address to register the avast. I am not sure if that is the problem. Can you help me out?
Title: Re: connection not established in the update
Post by: mchain on June 20, 2018, 01:40:20 AM: I suggest a clean install of avast as bob3160 shows here:
https://forum.avast.com/index.php?topic=204531.msg1466216#msg1466216 (https://forum.avast.com/index.php?topic=204531.msg1466216#msg1466216)

Notwithstanding the topic Bob is responding to is different, but a clean install should work for you. Be sure to save or obtain your license before beginning.

A clean install should re-establish your computer systems as being in your country, so this should work.

Is this Avast Free?
Title: Re: connection not established in the update
Post by: REDACTED on June 20, 2018, 01:46:09 AM: Thanks for your reply. I have tried that clean reinstall. Just like normal reinstallment, after I reinstall the free avast version, it shows "connnection established". However, after I reboot my laptop, it shows "connection not established" again.
Title: Re: connection not established in the update
Post by: mchain on June 20, 2018, 01:49:42 AM: That is normal for it to show "connection not established" after a system reboot. Avast servers lost contact with your system when you rebooted and they need some time to reconnect.

Wait a few minutes; up to 30 minutes should be sufficient.
Title: Re: connection not established in the update
Post by: REDACTED on June 20, 2018, 05:20:42 AM: Unfortunately I have been waiting a few days. It still shows "connection not established". So does the avast on the other laptop.
Title: Re: connection not established in the update
Post by: steens on June 20, 2018, 05:31:40 AM: Have you changed router/modem?
Title: Re: connection not established in the update
Post by: REDACTED on June 20, 2018, 06:24:32 AM: No. I can update manually.
Quote from: steens on June 20, 2018, 05:31:40 AM
Have you changed router/modem?
Title: Re: connection not established in the update
Post by: REDACTED on June 21, 2018, 01:54:43 AM: Anyone can help me?
Title: Re: connection not established in the update
Post by: Asyn on June 21, 2018, 04:53:04 AM: Update to the latest version (18.5.2342): https://forum.avast.com/index.php?topic=219889.0
Title: Re: connection not established in the update
Post by: REDACTED on June 21, 2018, 05:26:28 AM: I have already tried, but it does not help.
Title: Re: connection not established in the update
Post by: Asyn on June 21, 2018, 10:36:09 AM: Maybe related to your location (China)...
Title: Re: connection not established in the update
Post by: Alikhan on June 21, 2018, 04:32:46 PM: Quote from: ligp1981 on June 21, 2018, 05:26:28 AM
I have already tried, but it does not help.

Could you show a screenshot of the "connection not established" and the last time a streaming update was received?
Title: Re: connection not established in the update
Post by: REDACTED on June 21, 2018, 08:20:37 PM: I am in the US now. The last time a streaming update was received is on 2018/6/19 when I updated the program yesterday.
Title: Re: connection not established in the update
Post by: mchain on June 22, 2018, 03:06:16 AM: See Reply # 1. Picture is attached that shows settings that work.

Your Settings box above is closed and I/we cannot see your virus/streaming update settings. Open the Virus Settings box by clicking the "v" on the Settings line.

What do you see?
Title: Re: connection not established in the update
Post by: REDACTED on June 22, 2018, 07:42:14 PM: Sorry about my last screen shot. Please help me solve the problem.
The streaming updates has been checked all the time.
Title: Re: connection not established in the update
Post by: Asyn on June 23, 2018, 07:17:01 PM: - OS..? (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?
Title: Re: connection not established in the update
Post by: REDACTED on June 24, 2018, 06:22:23 PM: OS: win10 home 64bit 1803
no other security software
My laptop has been installed Avast since purchased and the update is good before May 18th 2018.
Title: Re: connection not established in the update
Post by: REDACTED on June 28, 2018, 07:39:20 AM: Will not be popular with others here, but I found that disabling the web shield will eliminate the problem. Which would indicate that the statement: " Firefox Tech stated that Avast is meddling with encrypted connections. The latest version of Firefox (Version 61) introduced a better security protocol TLS 1.3 but Avast cannot cope with it yet." from the previous post/thread is correct. Not recommending this as fix, just pointing out what I found.
Title: Re: connection not established in the update
Post by: derMeister on June 28, 2018, 08:59:41 AM: It's Firefox Update 61, they included TLS 1.3 and Avast still uses TLS 1.2 ! See https://www.ghacks.net/2018/06/27/firefox-61-fix-secure-connection-failed/ (https://www.ghacks.net/2018/06/27/firefox-61-fix-secure-connection-failed/)

Deactivate "HTTPS-Scanning" in "Avast Settings" -> "Web Shield" will fix the Problem!
Title: Re: connection not established in the update
Post by: lukor on June 28, 2018, 09:54:19 AM: Hi, we are working on a fix, will be released later today.

As a workaround, you can temporarily disable TLS1.3 in firefox settings.

1. In the address bar enter about:config
2. Search or scroll to security.tls.version.max
3. Change the value to 3

Done.

This will limit the TLS version to 1.2, the default for Firefox previous version and other browsers at this moment. I'll update here when an Avast fix is ready. Undoig this configuration change is easy as well, just follow the same steps and change the value back to 4.
Title: Re: connection not established in the update
Post by: REDACTED on June 28, 2018, 05:06:35 PM: Thanks for your reply.
There is no Firefox on my laptop. Only IE and chrome.
Title: Re: connection not established in the update
Post by: REDACTED on July 02, 2018, 06:01:38 PM: Hi.
Title: Re: connection not established in the update
Post by: REDACTED on July 03, 2018, 03:34:40 PM: Hello
Title: Re: connection not established in the update
Post by: bob3160 on July 03, 2018, 03:45:33 PM: Quote from: ligp1981 on July 03, 2018, 03:34:40 PM
Hello
Which site are you not able to visit and which browser are you using that's giving you that problem ???
Title: Re: connection not established in the update
Post by: REDACTED on July 04, 2018, 12:52:30 AM: I am able to visit any site. I am using IE and chrome.
Title: Re: connection not established in the update
Post by: REDACTED on July 05, 2018, 03:56:11 PM: Help.
Title: Re: connection not established in the update
Post by: bob3160 on July 05, 2018, 04:13:05 PM: Quote from: ligp1981 on July 05, 2018, 03:56:11 PM
Help.
Help with what ???
Title: Re: connection not established in the update
Post by: REDACTED on July 06, 2018, 12:37:59 AM: Help with
connection not established in the update
Title: Re: connection not established in the update
Post by: bob3160 on July 06, 2018, 12:51:25 PM: Quote from: ligp1981 on July 06, 2018, 12:37:59 AM
Help with
connection not established in the update
More information would be helpful.
What firewall ??? what other security related programs,
What version of Avast ???
Title: Re: connection not established in the update
Post by: REDACTED on July 07, 2018, 09:59:39 PM: No firewall.
No other security programs.
Free version.
Please check previous post for the details of my problem.
Title: Re: connection not established in the update
Post by: mchain on July 08, 2018, 07:08:50 AM: To be fair about this, topic was hijacked back on reply # 19 and conversation took off in a different direction - :(

I'm thinking you are using a VPN service to appear as in USA when you are not. As Asyn said, your true location, China, may have everything to do with your issues but you should tell us what your true location is; - you never did.

In fact, there has been a pattern of omitting key facts such as your OS and other things that we need to know to help you fix your issue present throughout your thread, and imo is you've been a little less than forthright about resolving your issue(s).

Why you chose to do that I cannot say.
Title: Re: connection not established in the update
Post by: REDACTED on July 08, 2018, 05:31:57 PM: I did not use VPN. I am now in the US.
The other laptop which never left US while I was in China for a vocation also has the problem.
Both of the laptop are Win 10 Home.
Both of the laptop have Avast Free edition.
Is there other information you need?
Title: Re: connection not established in the update
Post by: REDACTED on July 08, 2018, 05:35:34 PM: I told you on the #14 that I am now in the US.
Title: Re: connection not established in the update
Post by: REDACTED on July 18, 2018, 12:02:33 AM: :(
Title: Re: connection not established in the update
Post by: REDACTED on August 19, 2018, 06:36:43 PM: Problem resolved.
I did a lot of research.
Finally, I just restore Windows Firewall settings to default and reset network, and then restart my computer.
The problem resolved at last.