1. Using a Firewall or UTM/NGFW (Recommended for Corporate/School Networks)
If you’re managing a network with Cisco ASA/FTD, Fortinet, Sophos, Palo Alto, etc., you can block UC Browser by:
Block by Application ID
Many NGFWs can identify UC Browser via deep packet inspection (DPI). Look for application signatures like:
UC Browser or UCBrowser
HTTP header User-Agent containing UCBrowser/
Example (Cisco FTD):
bash
Copy
Edit
access-list BLOCK_UC extended deny ip any any
class-map match-any UC_Browser_App
match protocol ucbrowser
policy-map global_policy
class UC_Browser_App
drop
Block by Domain and IP
UC Browser often contacts the following domains:
*.9apps.com
*.ucweb.com
*.uc.cn
Block those domains using:
DNS filtering (Umbrella/OpenDNS, Pi-hole)
FQDN object groups in firewalls
2. Using Mobile Device Management (MDM)
If you're managing Android devices via Intune, MobileIron, Miradore, or Google Workspace, you can:
Blacklist UC Browser Package
UC Browser package name: com.UCMobile.intl
Push a policy to block or uninstall it
Prevent reinstallation via Play Store restrictions
Example in Intune:
Device compliance policy → Restricted apps → Add com.UCMobile.intl
3. For Parental or Home Network Control
Use DNS-based Filtering
Set up OpenDNS, CleanBrowsing, or NextDNS
Block domains related to UC Browser and 9Apps
Redirect all DNS to filtered DNS servers via your router
4. Manual (on the device)
If you're managing only a few Android devices:
Use an AppLocker/Blocker app to prevent access to UC Browser
Use Google Family Link to block specific apps or sites
Manually uninstall UC Browser and disable unknown source installs
Important: UC Browser is Known for Privacy Risks
UC Browser has been banned in some countries and flagged for:
Sending unencrypted data to remote servers
Bypassing standard HTTPS protocols
Security and privacy violations
Blocking it in sensitive environments is highly recommended.
Summary
Method How to Block
Firewall (NGFW) Use DPI or block UC domains/IPs
MDM (Intune, etc.) Block package com.UCMobile.intl
DNS Filtering Use OpenDNS/CleanBrowsing to block ucweb.com, 9apps.com
Manual (Local Device) Use Family Link or AppLocker to restrict app
