Public bug reported: Hi, After connecting the VPN
# killall -USR1 dnsmasq # tail syslog.log ... Jul 13 02:18:56 tp dnsmasq[1476]: time 1499905136 Jul 13 02:18:56 tp dnsmasq[1476]: cache size 0, 0/0 cache insertions re-used unexpired cache entries. Jul 13 02:18:56 tp dnsmasq[1476]: queries forwarded 154, queries answered locally 1 Jul 13 02:18:56 tp dnsmasq[1476]: queries for authoritative zones 0 Jul 13 02:18:56 tp dnsmasq[1476]: server 198.18.0.1#53: queries sent 0, retried or failed 0 Jul 13 02:18:56 tp dnsmasq[1476]: server 198.18.0.2#53: queries sent 0, retried or failed 0 Jul 13 02:18:56 tp dnsmasq[1476]: server 192.168.0.254#53: queries sent 12, retried or failed 0 The first two name server are provided by the vpn connection. The last 192.168.0.254 name server is running on my local router and forward request to my ISP (this is the default name server when VPN is not activated). When I query the DNS, queries are sent to each name server which makes a DNS information leaking to my ISP I validated that by the mean of tcpdump on eth and tun interfaces and also by using that site: https://www.dnsleaktest.com/ I tried to force the VPN DNS server IPs in the VPN configuration (edit Vpn connection -> ipv4 - > Automatic Adresses only ..) but the result is the same. dnsmasq must not have the local DNS present while VPN connection is established. ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1704288 Title: Ubuntu 16.04 VPN : DNS information leaking through dnsmasq To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1704288/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
