On desktop, sync frozen when connected with 4g network

Hello, i have a strange behaviour when i change my network. On my linux mint 19 laptop, everything works fine with my local network (wifi or lan) But when i’m connected through my cellphone connection (4g), sync is working 3 sec, it detect changes on my laptop or on my home desktop, but after that shows the home desktop disconnected and sync is stopped. Any idea about that ? Thank’s ! Cyril.

Check the logs.

When connected to the 4g network (i try to connect “sync-all-data”)
2019-02-28 09:26:58 Could not connect to relay relay://77.70.78.148:22067/?id=SYFZNAR-SUJ23BK-KHMG3TC-63LOFI6-FAK5KMG-CRMWAKB-DTSTVST-O2WQPQP&pingInterval=1m0s&networkTimeout=2m0s&sessionLimitBps=0&globalLimitBps=0&statusAddr=:22070&providedBy=deep: dial tcp 77.70.78.148:22067: connect: network is unreachable 2019-02-28 09:27:01 Could not connect to relay relay://5.9.16.38:22067/?id=2LUBIEC-ZNW4GMH-WKXLQUI-EZBCWDT-LRMPXL2-CIBPCB7-2KNIWFR-6T2WJQH&pingInterval=1m0s&networkTimeout=2m0s&sessionLimitBps=0&globalLimitBps=0&statusAddr=:22070&providedBy=: dial tcp 5.9.16.38:22067: connect: network is unreachable

Perhaps your 4g thing requires proxying as it seems normal connections to some of our services do not work. Perhaps you have some magical firewall or restrictions by the operator. Anyways, this issue beyond syncthing so not sure how much we can help.

I resolved the problem: there was just a parameter in my APN connection that was wrong (IPV6 instead of IPV4) Thank you for your help !

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