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Why does my IPTV streaming sometimes have lag/latency when it is behind ATP?
Problem Description I would like place TV box behind ATP for Internet protection. However, the video streaming has latency when the TV box is behind ATP. As confirmed, gateway is not in high CPU usage, IGMP works, and Internet bandwidth is still available. Everything looks good without issue. Why does my IPTV streaming…
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Why does SecuReporter not show any source MAC address in Traffic?
Check if device insight is enabled on the device. Once Device Insight is enabled, gateway starts to collect client device’s information, and query the fingerprint database to deeply identify. On the device, go to CONFIGURATION > Object > Device Insight to check if "Enable" is checked and a profile is configured.
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If you think the content filter is not working as expected
Symptom: If you think the content filter has not worked the webpage as expected. Checking: 1) Please block QUIC Ports. QUIC uses UDP port 80 and port 443. The complete TLS client Hello, including any TLS Server Name Indication (SNI) present, is sent in one or more CRYPTO frames across one or more QUIC Initial packets. 2)…
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When the site to site VPN traffic cannot reach Peer’s LAN
Symptom: 192.168.8.0/24 can’t access 192.168.9.0/24 Checking: 1)The policy of Any to ZyWALL have allowed ESP service and also allow AH if you it. Please ensure there are no deny rules above it. 2)VPN -> IPSec VPN -> VPN Connection , please check you have set zone. If you have customize zone, please remember to add…
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Why can't resolve a specific domain after manually add A record
Symptom: After added A record for “xxx.com”, a specific domain cannot be resolved. For example: You have record test.zyxel.com Then you cannot resolve IP address if the record exist. Root Cause: If a record is added, it will create a zone called “zyxel.com”. If the CNAME match the zone, this issue will occur. Workaround:…
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How to register and unregister USG FLEX series on Nebula Control Center (NCC)?
The USG FLEX series are Zyxel’s powerful firewall products that have the precise protection, delivering high level of performance and security for SMB business networks. With the recent integration of USG FLEX firewall series into the NCC, Nebula cloud-managed platform is now further enhanced with zero-trust security…
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Device HA Setup
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Device HA Setup
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What is Anti Spam?
E-mail is an indispensible form of communication that has made its way into every aspect of our modern lives. However, statistics show that more than 70 percent of all e-mail is spam, and more than 90 percent of spam carries some form of malware. To defend against spam, malware, and phishing attacks, it is essential to…
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ZLD Series - Anti-Spam Troubleshooting
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ZLD Series - Anti-Spam
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What is Anti-Virus
ZyXEL Anti-Virus security subscription is a gateway-level antivirus utility targeting known malware including viruses, Trojans, worms, spyware and rogueware, ZyXEL Anti-Virus scans traffic on major protocols including HTTP, HTTPS, FTP, SMTP, and POP3. Gateway-level antivirus protection is first-line essential security for…
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Anti-Virus Troubleshooting
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How to check incoming packets inspection using the Anti-Virus engine.
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What is Intrusion Detection And Prevention?
Today’s networks are under attack from an ever-expanding array of threats - viruses, malware, and other exploits. Hackers are increasingly adept at avoiding detection, and unlike with automated threats like viruses, the goal of these intrusions is often the theft of specific personal or financial information. For this…
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How to setup of the ZyWALL’s IDP (Intrusion Detection and Prevention) feature
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What is Content Filtering?
While nobody would dispute that the Internet is an indispensable tool for business, there exist many malicious sites that would trap users, potentially infecting systems with viruses or installing spyware when carelessly accessed. An efficient solution is necessary for administrators to manage web access and control…
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Content Filter Troubleshooting
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ZyWALL Series UTM Setup Content Filtering
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What is Application Intelligence?
Managing employees who waste too much time on non-work related applications can be a major challenge for businesses. Administrators face losing not only productivity, but network bandwidth to unrestricted Internet use. ZyXEL Application Intelligence software controls employee network use and covers 19 categories of…