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OpenVPN 每天大约断线一次，日志表明 DNS 故障

tag-icon • tag-icon dns openvpn pfsense pihole
OpenVPN 每天大约断线一次，日志表明 DNS 故障

我有一个旧版本的 pfSense (2.3.2)，运行 OpenVPN 客户端连接到商业服务器。过去几年，OpenVPN 连接断开的频率越来越高，现在大约每天一次。有一段时间，它甚至无法打开，这样我的所有流量都可以畅通无阻。我不确定我是否修复了这个问题，或者那个特定的故障情况不再是问题。

当 VPN 出现故障时，重新启动服务即可。网络日志中充满了：

Sep 16 13:45:24     openvpn     13283   RESOLVE: Cannot resolve host address: us-commercialOpenVPNProvider.com: hostname nor servname provided, or not known

Ping也无法tracerte解析地址，我的 Pi-Hole 中充满了对同一名称的请求。Pi-Hole 缓存只有大约 5 分钟，所以它应该能够在该名称丢失之前刷新缓存，对吧？这是 DNS 问题，还是 DNS 只是个幌子，我还有另一个问题？

第 2 天

我将今天失败的 nslookup 与昨天的 nslookup 进行了比较，结果让我很惊讶。所有 DNS 记录都不一样。我认为这是 DNS/负载平衡问题。

Server:  <pihole>
Address:  172.16.x.x

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
Non-authoritative answer:
Name:    <CommercialOpenVPNProvider>.com
Addresses:  66.115.169.196
          66.115.169.205
          66.115.168.2
          66.115.168.4
          66.115.169.218
          66.115.169.244
          66.115.169.228
          66.115.169.220
          66.115.168.25
          66.115.168.14
          66.115.169.210
          66.115.169.211
          66.115.168.11


C:\Users\<USER>>nslookup <CommercialOpenVPNProvider>.com
Server:  <pihole>
Address:  172.16.x.x

DNS request timed out.
    timeout was 2 seconds.
DNS request timed out.
    timeout was 2 seconds.
Non-authoritative answer:
Name:    <CommercialOpenVPNProvider>.com
Addresses:  66.115.169.239
          66.115.168.28
          66.115.168.19
          66.115.168.18
          66.115.169.223
          66.115.168.10
          66.115.169.205
          66.115.169.226
          66.115.169.203
          66.115.168.24
          66.115.169.244
          66.115.168.9
          66.115.168.13


C:\Users\<USER>>

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