请教一个奇怪网络连通性的问题

root@wiki-4837-pre:~# curl -I http://www.gstatic.com/generate_204 curl: (28) Failed to connect to www.gstatic.com port 80 after 3067 ms: Couldn’t connect to server root@wiki-4837-pre:~# curl -I http://www.gstatic.com/generate_204 -vv * Host www.gstatic.com:80 was resolved. * IPv6: 2607:f8b0:4007:810::2003 * IPv4: 142.250.189.3 *   Trying 142.250.189.3:80… *   Trying [2607:f8b0:4007:810::2003]:80… * Immediate connect fail for 2607:f8b0:4007:810::2003: Network is unreachable * connect to 142.250.189.3 port 80 from 172.247.*.* port 53350 failed: Connection timed out * Failed to connect to www.gstatic.com port 80 after 3100 ms: Couldn’t connect to server * Closing connection curl: (28) Failed to connect to www.gstatic.com port 80 after 3100 ms: Couldn’t connect to server root@wiki-4837-pre:~# nexttrace 142.250.189.3 NextTrace v1.3.4 2024-09-10T13:25:26Z 6a3ea6a 2024/10/15 11:46:23 IP connection has been timeout, please check your network [NextTrace API] preferred API IP –  – ms – Get “https://45.88.195.154:443/v3/challenge/request_challenge”: dial tcp 45.88.195.154:443: connect: connection timed out RetToken failed 3 times, please try again after a while, exit root@wiki-4837-pre:~# 复制代码 一个上游是cera的4837优化线路，我连接服务器和ping服务器都正常，ssh连接也正常。 但是从vps访问其他网站就时不时啥也连不上，这到底是啥问题啊，有点摸不着头脑。