I'm connected on the internet using a B525s Huawei router using 4G.
I tried 2 operators in Switzerland: - sunrise (www.sunrise.ch) - salt (www.salt.ch)
With 'salt' I have no problems what so ever. However with sunrise for around 2 months some websites are randomly not accessible. The more critical one being cloudflare.
curl -v https://www.cloudflare.com
* Rebuilt URL to: https://www.cloudflare.com/
* Trying 198.41.215.162...
* TCP_NODELAY set
* Connected to www.cloudflare.com (198.41.215.162) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
* CAfile: /etc/ssl/cert.pem
CApath: none
* TLSv1.2 (OUT), TLS handshake, Client hello (1):
* TLSv1.2 (IN), TLS handshake, Server hello (2):
* TLSv1.2 (IN), TLS handshake, Certificate (11):
* TLSv1.2 (IN), TLS handshake, Server key exchange (12):
* TLSv1.2 (IN), TLS handshake, Server finished (14):
* TLSv1.2 (OUT), TLS handshake, Client key exchange (16):
* TLSv1.2 (OUT), TLS change cipher, Client hello (1):
* TLSv1.2 (OUT), TLS handshake, Finished (20):
* LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to www.cloudflare.com:443
* stopped the pause stream!
* Closing connection 0
The support line of sunrise is of no help. They answer me that they don't support IP ;)
What I tried:
- change the router
- change the MTU (to 1492 on my computers)
- try different IP address using the --resolve option of curl
The only way to succeed to connect was to change of provider (using salt instead of sunrise) but this is not a long term solution for me.
Any idea about what could be the reason of this and how to test it ?