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Why the AP firmware version would be shown on the firewall?
Background and Scenario: Why when you check the log of the firewall and would see AP firmware related messages such as "AP firmware check successful. Available firmware: V6.50 Patch 1." Answer: Because Zyxel firewall supports AP controller feature, this message indicates that there is available firmware, V6.50 Patch 1,…
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What is the difference between “Monitor interface” and “Enable Failover When Interface Failure”in HA
Question What is the difference between “Monitor interface” and “Enable Failover When Interface Failure” Answer Monitor Interface is for layer 1 physical link monitor, it is trigger by physical link up/down. Enable Failover When Interface Failure” works on layer 3, when you enable this, you also need to enable…
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Why it does not work when we enable "Enable Highest Bandwidth Priority for SIP Traffic"
Question I had tick “Enable BWM” and “Enable Highest Bandwidth Priority for SIP Traffic” on “Configuration > BWM” Why it does not work when we enable "Enable Highest Bandwidth Priority for SIP Traffic" Answer It must enable SIP ALG on “Configuration > Network > ALG” when applying sip traffic QOS.
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Why we are unable to access specific web site when hosts are behind FLEX/ATP?
Question Why some specific web sites are unable to access when hosts are behind FLEX/ATP, but those sites/URL can be access when bypass FLEX/ATP? Answer If web site has TTL expire issue, it leads to session drop by device. Please disable destroy session on this device and try it again. Router(config)# firewall icsa…
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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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Device HA Setup
https://us.v-cdn.net/6029482/uploads/AITDOJ0ZND6R/device-ha-setup-429.pdf
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Device HA Setup
https://us.v-cdn.net/6029482/uploads/B1H313X2PTBJ/device-ha-setup-429.pdf
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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
https://us.v-cdn.net/6029482/uploads/AM8W6Y4SCMVC/antispam-troubleshooting-1.pdf
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ZLD Series - Anti-Spam
https://us.v-cdn.net/6029482/uploads/5W0RA5N9UZID/antispam-walkthrough.pdf
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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
https://us.v-cdn.net/6029482/uploads/9HST9L391166/anti-virus-troubleshooting-1.pdf
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How to check incoming packets inspection using the Anti-Virus engine.
https://us.v-cdn.net/6029482/uploads/8ZQEHAZKA3J0/zywall-utm-av-setup-cr-0429.pdf
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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
https://us.v-cdn.net/6029482/uploads/RK3I9DHJB4LQ/zywall-utm-idp-setup-cr.pdf
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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…