IPSec on iOS 13.1.3 on iPhone 8
First, download the CA.crt from IRCNow using a web browser (such as Safari).
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Tap on Allow. Then, tap Close. Tap your Home Button and then open the Settings app. Tap on the General row.
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Tap on the Profile row. Tap on vpn3.ircnow.org.
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Tap on Install at the top right corner.
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Enter your passcode.
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Tap on Install at the top right corner. Then tap Install again at the bottom.
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The profile will now be verified.
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Now, tap Profile at the top left corner, then tap General again to return to the general settings. Tap on VPN. Tap Add VPN Configuration. Fill in the details:
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Description: IRCNow
Server: vpn3.ircnow.org
Remote ID: vpn3.ircnow.org
Local ID: [your username]
User Authentication: Username
Username: [your username]
Password: [your password]
Tap done when finished.
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Tap on the status toggle to connect to the VPN. If the VPN is working, you should see a VPN icon at the top of the status bar.
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For legacy users, the old cert is here: CA.crt