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When connecting iOS devices to our Sonicwall VPN (L2TP) it takes about 30 seconds before any internal servers can be contacted. It appears to be purely a DNS problem because they can be contacted via IP address. This issue does not exist on Mac or PC desktops/laptops.

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  • I have observed the same behavior on iOS and OS X and we are tunneling all traffic.
    – sardean
    Oct 2, 2014 at 18:53
  • I have tried flipping the all traffic switch with no change in behavior.
    – Brian
    Oct 2, 2014 at 18:54
  • Yes, sorry for the lack of clarity but we experience the same behavior regardless of tunnel all or not. I have not been able to find a solution as of yet.
    – sardean
    Oct 2, 2014 at 19:14
  • My above post was in error, i missed the iOS part. This is for the os x client
    – user274144
    Mar 3, 2015 at 7:32

1 Answer 1

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It's an IPV6 issue, if you go to console and open your ppp log you will notice an IPv6 query every 3 seconds until it times out. You need to tell the ppp daemon to not try IPv6. To do this create a text file called options.txt with the following string: ipv6cp-max-configure 0 Save that file to the etc/ppp directory. You need to be root or sudo cp it via terminal. Reboot and your problem should go away.

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