That is probably the issue that you are running into. Please refer - https://github.com/grpc/grpc/blob/master/doc/environment_variables.md for the environment variables that gRPC uses. You can override by using the channel arg - GRPC_ARG_ENABLE_HTTP_PROXY and setting it to 0.
On Wednesday, November 17, 2021 at 7:14:15 AM UTC-8 bengtgus...@gmail.com wrote: > We were thinking that maybe the problem is that the gRPC library is trying > to use a http proxy set up by our customers' IT administrators on employee > PCs. To me it is not clear whether gRPC (C++ version, out of the box) would > try to use proxy settings in a PC if there are any. > > One customer tried a laptop at home which worked, brought it to the > office, and it couldn connect anymore. > > tisdag 16 november 2021 kl. 13:58:47 UTC+1 skrev Bengt Gustafsson: > >> Hi. We have a gRPC based server on the internet and our own client >> software connecting to it at different customer sites. Quite often these >> clients can't connect due to probably some firewall issue in their intranet >> to internet connection. We changed to using port 443 to avoid firewalls >> blocking outgoing traffic on unknown ports but that doesn't help. >> >> I turned on logging using gpr_set_log_verbosity(GPR_LOG_SEVERITY_INFO); >> but I got nothing at all before I got the return value deadline_exceeded. I >> have increased the timeout to 10s so it's not just slow. >> >> I replaced the URL with the corresponding ip number and then I got could >> not connect to all addresses with no measurable delay. >> >> Any tips and tricks that could be useful? >> >> >> -- You received this message because you are subscribed to the Google Groups "grpc.io" group. To unsubscribe from this group and stop receiving emails from it, send an email to grpc-io+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/grpc-io/9ffbaa74-23a7-4300-a6f6-fc2ad442d615n%40googlegroups.com.
