You've stay in a cafe?
You have private mobile router or tethering with enough data transfer rate? No?
You've tried to connect free hotspot Wi-Fi?(Tully's, Starbucks, and so on.)
You've opened a browser?
Frequently you can't seen Wi-Fi login page?
When I have this issue, I'll find login page manually following way.
Find the following IP address
Enter each address in to browser that you've got.
You may be shows Wi-Fi authentication page.
Default gateway also have same IP address of DNS server.
lasthope-mbp:~ wnoguchi$ route get 0.0.0.0 route to: default destination: default mask: default gateway: 10.0.0.1 interface: en0 flags: <UP,GATEWAY,DONE,STATIC,PRCLONING> recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire 0 0 0 0 0 0 1500 0 lasthope-mbp:~ wnoguchi$ ping 184.108.40.206 PING 220.127.116.11 (18.104.22.168): 56 data bytes ^C --- 22.214.171.124 ping statistics --- 1 packets transmitted, 0 packets received, 100.0% packet loss lasthope-mbp:~ wnoguchi$ ping 10.0.0.1 PING 10.0.0.1 (10.0.0.1): 56 data bytes Request timeout for icmp_seq 0 Request timeout for icmp_seq 1 Request timeout for icmp_seq 2 ^C --- 10.0.0.1 ping statistics --- 4 packets transmitted, 0 packets received, 100.0% packet loss lasthope-mbp:~ wnoguchi$ dig www.google.com ; <<>> DiG 9.10.6 <<>> www.google.com ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27522 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 1400 ;; QUESTION SECTION: ;www.google.com. IN A ;; ANSWER SECTION: www.google.com. 37 IN A 126.96.36.199 ;; Query time: 32 msec ;; SERVER: 198.51.100.123#53(198.51.100.123) ;; WHEN: Wed Dec 19 10:59:47 JST 2018 ;; MSG SIZE rcvd: 59
In this example, following results are possible login page address.
;; SERVER: 198.51.100.123#53(198.51.100.123)
Have fun, internet junkie.