9 09 2019
IPv6 leaks, DNS leaks, OpenVPN, IPSEC, L2TP
Test for DNS and IPv6 leaks:
https://dnsleaktest.com/
https://wtfismyip.com/ (shows your VPN IPv4 address *and* leaked IPv6, if applicable)
Prevent DNS leaks:
https://www.pcsuggest.com/check-and-fix-dns-leak-linux/
add “redirect-gateway def1” to your openvpnclient.conf file …
Prevent IPv6 leaks (i.e. temporarily disable IPv6):
sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.wlp2s0.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1
China VPN:
Tested VPN protocols are working nicely (openvpn, ipsec/l2tp). That’s not surprising, using VPNs is legal in China for company/enterprise use.
Only requirement: connect to VPN IP directly, don’t use hostnames that require DNS lookups (DNS lookups for VPN providers are blocked).
LinPhone VOIP client softphone: Importing SIP contacts from Google Contacts via commandline using PHP on GNU/Linux CO2 Kompensation für Flüge (vom österr. Finanzamt anerkannt)
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