Block Cad from connecting to its server

 

To block AutoCAD 2020 from connecting to Autodesk's servers, you can use several methods:

 

Method 1: Block AutoCAD in Windows Firewall

 1. Open Windows Firewall

 Press Win + R, type firewall.cpl, and hit Enter.

 2. Create a New Outbound Rule

 Click Advanced Settings on the left panel.

 Click Outbound Rules → New Rule (on the right).

 Select Program, then click Next.

 Choose This program path, then browse to:

 C:\Program Files\Autodesk\AutoCAD 2020\acad.exe

 Click Next, select Block the connection, and click Next again.

 Select Domain, Private, Public, then click Next.

 Name the rule (e.g., "Block AutoCAD Internet") and click Finish.

 3. Repeat for Inbound Rules (optional, but recommended).

 

 Method 2: Modify the Hosts File

 

1. Open Notepad as Administrator.

2. Click File → Open, navigate to:

 C:\Windows\System32\drivers\etc\

 Select All Files, then open hosts.

3. Add these lines at the bottom:

 

127.0.0.1 lm.licenses.adobe.com

127.0.0.1 lmlicenses.wip4.adobe.com

127.0.0.1 lm.licenses.autodesk.com

127.0.0.1 na.licenses.autodesk.com

127.0.0.1 auth.autodesk.com

 

 

4. Save the file and restart your PC.

 

Method 3: Disable AutoCAD Automatic Updates

 

1. Open AutoCAD and click the ?" (Help) button.

2. Select About AutoCAD 2020 → Manage License.

3. Disable online license checking if available.

4. Go to Options (OP in command bar), then in the System tab, turn off updates.

 

Method 4: Block AutoCAD with Antivirus

 

1. Open your antivirus software.

2. Find Firewall or Application Control settings.

3. Locate acad.exe and set it to Blocked or Ask.

 This will prevent AutoCAD from accessing the internet, blocking updates and server communication.

5.Modifying the Registry:

• Press Windows+R to open the Run dialog box.
• Type regedit and click OK to open the Registry Editor.
• Navigate to the following key: HKEY_CURRENT_USER\Software\Autodesk\ODIS
• Create a new DWORD (32-bit) Value named DisableManualUpdateInstall.
• Set the value data to 1 to disable update notifications and the Update button in Autodesk Access, or 2 to show update notifications but disable the Update button.

This will prevent Autodesk Access from checking for updates.

C:\Windows\System32\drivers\etc

Copy Files from Here

# 127.0.0.1 lm.licenses.adobe.com
# 127.0.0.1 lmlicenses.wip4.adobe.com
# 127.0.0.1 lm.licenses.autodesk.com
# 127.0.0.1 na.licenses.autodesk.com
# 127.0.0.1 auth.autodesk.com

# 127.0.0.1 autodesk.com
# 127.0.0.1 www.autodesk.com
# 127.0.0.1 cur.autodesk.com
# 127.0.0.1 mcs.autodesk.com
# 127.0.0.1 acad.autodesk.com

Corel draw

127.0.0.1 corel.com
127.0.0.1 www.corel.com
127.0.0.1 corel.com
127.0.0.1 updates.corel.com