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If you're entering a code, the 2FA method you're using is still susceptible to mitm-style phishing attacks, which is what this kind of location based check is s

If you're entering a code, the 2FA method you're using is still susceptible to mitm-style phishing attacks, which is what this kind of location based check is securing against. You'd need a push notification or yubikey based 2fa check to get the same level of security.

zozbot234 5y ago
AIUI, they do send push notifications if you happen to have a mobile device that's logged in to the same account. Maybe they should do the same for the "suspicious login to an unused 'secondary' account" scenario? They're already sending "recovery" emails, so it wouldn't be that big of a change.
zenexer 5y ago
I have several YubiKeys linked to my account. It will decline those as well. It demands that I sign in from Android sometimes, seemingly for no reason.
- smileybarry 5y ago
  That's especially weird. I've had Google decline TOTP/Google Authenticator and SMS one time when I was troubleshooting a OAuth issue, but declining U2F? Are you logging in from various different VPN servers daily, or just through the same few ISPs?
  - zenexer 5y ago
    No VPNs, just my home network with an IP address that rarely changes. What seems to throw it off is when I log in from "conflicting" platforms, particularly iOS + Android. I also have multiple iPhones for work, and it very much dislikes that. When it gets in this state, nothing will work besides going to g.co/sc on Android--it can't be any other platform, regardless of how long I've had the device--and approving the code request there. If I approve it from any other device, even with a YubiKey, it'll give me a code on g.co/sc, but I'll be told it's invalid and I'll get one of those emails telling me the code was correct but declined due to suspicious activity. I appreciate the attention to security, but c'mon, it's a YubiKey, and I'm logging in from my usual residential location.

zozbot234 5y ago

AIUI, they do send push notifications if you happen to have a mobile device that's logged in to the same account. Maybe they should do the same for the "suspicious login to an unused 'secondary' account" scenario? They're already sending "recovery" emails, so it wouldn't be that big of a change.

zenexer 5y ago

I have several YubiKeys linked to my account. It will decline those as well. It demands that I sign in from Android sometimes, seemingly for no reason.

smileybarry 5y ago
That's especially weird. I've had Google decline TOTP/Google Authenticator and SMS one time when I was troubleshooting a OAuth issue, but declining U2F? Are you logging in from various different VPN servers daily, or just through the same few ISPs?
- zenexer 5y ago
  No VPNs, just my home network with an IP address that rarely changes. What seems to throw it off is when I log in from "conflicting" platforms, particularly iOS + Android. I also have multiple iPhones for work, and it very much dislikes that. When it gets in this state, nothing will work besides going to g.co/sc on Android--it can't be any other platform, regardless of how long I've had the device--and approving the code request there. If I approve it from any other device, even with a YubiKey, it'll give me a code on g.co/sc, but I'll be told it's invalid and I'll get one of those emails telling me the code was correct but declined due to suspicious activity. I appreciate the attention to security, but c'mon, it's a YubiKey, and I'm logging in from my usual residential location.