In this article we will provide a summary of some articles to help troubleshoot common VPN connection issues.
This article provides some tips to help troubleshoot VPN connections that frequently disconnect.
https://faq.draytek.com.au/2019/12/10/troubleshooting-unstable-vpn-connections/
This article covers some troubleshooting tips when the VPN tunnel is online, but you cannot access the hosts on the remote network cannot accessed.
Click here for the application note or go to the URL: https://www.draytek.com/support/knowledge-base/5722
This application note covers a scenario where the WAN MTU setting can affect connectivity and data flow over a VPN tunnel.
Other related articles are:
Unable to Access Remote Router Web Page over IPsec VPN Tunnel
https://faq.draytek.com.au/2015/08/14/unable-to-access-remote-router-web-page-over-ipsec-vpn-tunnel/
Lower VPN MSS to access the peer router’s Web UI through VPN
This application note will help you analyse the VPN syslogs when using IKEv2 EAP for VPN connections. It helps in understanding the IKEv2 EAP creation process and troubleshooting any issues.
Click here for the application note or go to the URL: https://faq.draytek.com.au/2020/04/20/ikev2-eap-vpn-log-analysis/
Sometimes VPN connections will drop due to inactivity for a period of time specified in the Idle Timeout setting in VPN profiles. This article shows how to configure the Idle Timeout settings so maintain a constant VPN connection without dropping.
Click here for the application note or go to the URL:
https://faq.draytek.com.au/2019/08/30/explanations-of-lan-to-lan-vpn-timeout-values/
Troubleshooting IPsec VPN connectivity issues can be a complex task and often requires VPN logs to be analysed. This article uses an example to describe the process of establishing an IPsec VPN tunnel and messages displayed in the syslog. This will help you in troubleshooting any issues.
Click here for the application note or go to the URL:
https://faq.draytek.com.au/2019/08/28/how-to-analyse-vpn-ipsec-logs/
This article looks at some common VPN syslog messages for VPN tunnels unable to be established and explains the cause. This will assist in getting the VPN tunnels going.
Click here for the application note or go to the URL:
https://faq.draytek.com.au/troubleshooting-tips-for-vpns-not-connecting/
Smart VPN Troubleshooting
Vigor Router supports using an Active Directory server or LDAP server to authenticate VPN clients or LAN clients. However, it is not easy to get the right configurations in the beginning because there are various Active Directory/LDAP servers’ structures. This document provides some tips on troubleshooting LDAP issues.
DrayTek Smart VPN Client software for windows requires DrayTek Virtual PPP adapter to provide the SSL VPN service. The driver should be installed during Smart VPN Client software installation; however, if you see such error while establishing the SSL VPN connection, please follow the steps to resolve it.
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