Blocking not working on iPhone (since iOS 17?)

[darren1234]

I’ve found that blocking no longer works on my Apple devices. Possibly since upgrading to iOS 17, unsure. I can confirm that my DNS server is giving the devices the IP address of the OpenDNS landing page, but somehow they’re still loading the pages that should be blocked. I have Apple Private Relay turned off (as it’s known to break OpenDNS) and have blocked proxies/anonymisers in OpenDNS. I do have “Limit IP Address Tracking” on on my Wi-Fi connection as it’s the default setting, and has always still worked before. Even turning it off doesn’t help. Any ideas where to look further? I don’t have the ability to sniff traffic on my gateway, but I guess that would be the next thing to try.

[camb1968]

Reg,
Yes, I’m testing in iPhone 14 with iOS version 17.1.2.
Tried with OpenDNS IPv4 DNS, no IPv6 DNS configured.
Same thing with Safari, Chrome Edge and Brave.

I have an old iPhone 6s that has iOS 15.8 and it is working fine in that one.

Let me know if there is anything else, you’d like for me to try.

Thanks,
CA

[bhumz]

Is there any update on this. PC doesn't work on any Apple Devices.

[reham1]

Hello,

Our level 2 support team are still looking into this. 

I will update this when I hear back from them.

[mattlee10]

Pretty terrible to not have a solution after 3 months. My "fix" was on my iPhone to go to the wifi i'm on, select info on it and disable Limit IP Address Tracking.

[darren1234]

@mattlee10, I haven't tried it for a while, but I found turning that setting off didn't help (as per OP). Even if it does, that isn't really a solution. I can't stop people at the door and ask to inspect their phones and change settings to suit my network requirements!

[reham1]

Hello,

I have asked my manager to contact the Level 2 support and will update this when I hear back from them.

Sorry for any inconveniences this has caused. 

[darren1234]

I’ve recently found that this issue seems to be resolved. I’ve had a new phone in the last couple of weeks (also an iPhone, and I restored it from the old one so I don’t think it was a configuration issue). But whether it was that, an iOS update or something OpenDNS have done, I don’t know.

[reham1]

Hello, 

Glad to hear that the problem appears to be resolved.

If it happens again please advise.

[ref.alunos]

Hi 4728470388

I'm sad to inform that i have the EXACT same issue. I tried to block all the category and the iphone insist in bypass all the blocks. Porn, guns, illegal, etc... It's an Iphone 12 with iOS 17.3.1 and the test went on safari and chrome. The blocks for android and windows are perfect. But not so in iOS.

I tried to block DoH, DoT, QUIC in my mikrotik but nothing appears to block the iphone "bypasser".

[darren1234]

@ref.alibis. Can you try upgrading to iOS 17.4 and see if it fixes it for you?

[jeremybentham]

I am having the same problem. I am on the latest update, iOS 17.4 on an iphone 12. 

Under wifi/manage dns I have followed these instructions: https://support.opendns.com/hc/en-us/articles/228008987-IOS-10-Device-Configuration-for-OpenDNS. I am selecting "manual" and correctly entering the DNS server addresses, separated by a comma as shown here. Here is shown the "family shield" Open DNS server settings, but I get the same results using 208.67.222.222, 208.67.220.220.

Yet, when I go to https://welcome.opendns.com/ I get the "oops!" page every time. On my PC, everything is working as it should with OpenDNS. My iPhone is not on the cellular network, but only on wifi, and I can't figure out why DNS won't work on it there. 

Extremely frustrating, not sure what else to do.

[reham1]

Hello, 

Please create a support request so the problem can be diagnosed completely which is not possible in the forum context.

[asifsu]

I’ve found that OpenDNS blocking no longer works on my Apple iPhone after upgrading IOS to 18.2.1.  This may be the same issue reported above "with upgrading to IOS 17". I can confirm that my DNS servers are configured properly in my NetGear WiFi router as all other Windows systems on my  WiFi network and other apple iPhones running IOS 15.8.3 are blacking and working fine and do block the continent define in OpenDNS. Do CISCO have any solution?