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Bumped by Community user
Bumped by Community user
Bumped by Community user
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wrschneider
wrschneider
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I am having a similar issue as this, where somesome public wifi works on my iPhone and not on my Mac (Big Sur 11.6.1)

iPhone connects to public Wi-Fi but Mac doesn't - why?

Other public wifi works fine.

Troubleshooting further, I see that the wifi itself connects, I got an IP address but the TCP connection times out when trying to connect to the captive portal. I can ping the IP where I get redirected (something like 172.0.20.1), but can't establish an HTTP connection on port 8000. It's a TCP issue rather than a cert error, because it doesn't even get a TCP connection established (confirmed with curl -v). My phone can reach the same port and IP on the same wifi.

I suspect some settings might be blocking outbound TCP - where should I look? Settings & Privacy > Firewall seems to be focused on inbound connections.

I am having a similar issue as this, where some public wifi works on my iPhone and not on my Mac (Big Sur 11.6.1)

iPhone connects to public Wi-Fi but Mac doesn't - why?

Troubleshooting further, I see that the wifi itself connects, I got an IP address but the TCP connection times out when trying to connect to the captive portal. I can ping the IP where I get redirected (something like 172.0.20.1), but can't establish an HTTP connection on port 8000. It's a TCP issue rather than a cert error, because it doesn't even get a TCP connection established (confirmed with curl -v). My phone can reach the same port and IP on the same wifi.

I suspect some settings might be blocking outbound TCP - where should I look? Settings & Privacy > Firewall seems to be focused on inbound connections.

I am having a similar issue as this, where some public wifi works on my iPhone and not on my Mac (Big Sur 11.6.1)

iPhone connects to public Wi-Fi but Mac doesn't - why?

Other public wifi works fine.

Troubleshooting further, I see that the wifi itself connects, I got an IP address but the TCP connection times out when trying to connect to the captive portal. I can ping the IP where I get redirected (something like 172.0.20.1), but can't establish an HTTP connection on port 8000. It's a TCP issue rather than a cert error, because it doesn't even get a TCP connection established (confirmed with curl -v). My phone can reach the same port and IP on the same wifi.

I suspect some settings might be blocking outbound TCP - where should I look? Settings & Privacy > Firewall seems to be focused on inbound connections.

Source Link
wrschneider
wrschneider
  • 63
  • 1
  • 2
  • 8

Mac not connecting to public Wifi, TCP to captive portal blocked?

I am having a similar issue as this, where some public wifi works on my iPhone and not on my Mac (Big Sur 11.6.1)

iPhone connects to public Wi-Fi but Mac doesn't - why?

Troubleshooting further, I see that the wifi itself connects, I got an IP address but the TCP connection times out when trying to connect to the captive portal. I can ping the IP where I get redirected (something like 172.0.20.1), but can't establish an HTTP connection on port 8000. It's a TCP issue rather than a cert error, because it doesn't even get a TCP connection established (confirmed with curl -v). My phone can reach the same port and IP on the same wifi.

I suspect some settings might be blocking outbound TCP - where should I look? Settings & Privacy > Firewall seems to be focused on inbound connections.