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-rwxr-xr-xsrc/leap/bitmask/vpn/helpers/linux/bitmask-root7
1 files changed, 5 insertions, 2 deletions
diff --git a/src/leap/bitmask/vpn/helpers/linux/bitmask-root b/src/leap/bitmask/vpn/helpers/linux/bitmask-root
index 9be9a61a..ee838164 100755
--- a/src/leap/bitmask/vpn/helpers/linux/bitmask-root
+++ b/src/leap/bitmask/vpn/helpers/linux/bitmask-root
@@ -628,7 +628,7 @@ def firewall_start(args):
enable_ip_forwarding()
# allow dns to localhost
ip4tables("-t", "nat", "--append", BITMASK_CHAIN, "--protocol", "udp",
- "--dest", "127.0.1.1,127.0.0.1", "--dport", "53",
+ "--dest", "127.0.1.1,127.0.0.1,127.0.0.53", "--dport", "53",
"--jump", "ACCEPT")
# rewrite all outgoing packets to use VPN DNS server
# (DNS does sometimes use TCP!)
@@ -637,10 +637,13 @@ def firewall_start(args):
ip4tables("-t", "nat", "--append", BITMASK_CHAIN_NAT_OUT, "-p", "tcp",
"--dport", "53", "--jump", "DNAT", "--to", NAMESERVER+":53")
# enable masquerading, so that DNS packets rewritten by DNAT will
- # have the correct source IPs
+ # have the correct source IPs. Apply masquerade only to the NAMESERVER,
+ # we don't want to apply it to the localhost dns resolver.
ip4tables("-t", "nat", "--append", BITMASK_CHAIN_NAT_POST,
+ "--dest", NAMESERVER,
"--protocol", "udp", "--dport", "53", "--jump", "MASQUERADE")
ip4tables("-t", "nat", "--append", BITMASK_CHAIN_NAT_POST,
+ "--dest", NAMESERVER,
"--protocol", "tcp", "--dport", "53", "--jump", "MASQUERADE")
# allow local network traffic