That might be your network provider’s proxy blocking access.
We’re currently on pub WiFi and it blocks all access to Mullvad, which is frustrating, because it means our web traffic - or at least the sites we’re visiting - are not private and can be viewed by the provider. Potentially they could also MITM TLS traffic, rendering that also insecure. I’m scowling at you Marston’s Inns.
Possibly they also block other well know VPNs.
I’d not be using it at all but for the fact 4G/5G signal around here is so poor.
EDIT: I got the bit between my teeth on this one. So Marston's appear to use a captive portal for WiFi and, it turns out, the issue is typically the MTU (maximum transmission unit). On macOS I can get Mullvad to connect using an MTU of 1280, and can then access the article. However, the MTU setting isn't available on Mullvad's iOS app. Some additional reading suggests that I could use the Wireguard iOS app instead, which would allow me to tweak MTU, but I'm not yet sure how I could set this up to work with my Mullvad subscription. I get the impression it may be possible although I have no idea how many of the additional protections (multi-hop, DAITA, etc.) would be usable going this route.
We’re currently on pub WiFi and it blocks all access to Mullvad, which is frustrating, because it means our web traffic - or at least the sites we’re visiting - are not private and can be viewed by the provider. Potentially they could also MITM TLS traffic, rendering that also insecure. I’m scowling at you Marston’s Inns.
Possibly they also block other well know VPNs.
I’d not be using it at all but for the fact 4G/5G signal around here is so poor.
EDIT: I got the bit between my teeth on this one. So Marston's appear to use a captive portal for WiFi and, it turns out, the issue is typically the MTU (maximum transmission unit). On macOS I can get Mullvad to connect using an MTU of 1280, and can then access the article. However, the MTU setting isn't available on Mullvad's iOS app. Some additional reading suggests that I could use the Wireguard iOS app instead, which would allow me to tweak MTU, but I'm not yet sure how I could set this up to work with my Mullvad subscription. I get the impression it may be possible although I have no idea how many of the additional protections (multi-hop, DAITA, etc.) would be usable going this route.