When there are no IPv6 DNS published, the adapter state is not
sanitized and might contain IPv6 DNS server from a previous session.
netsh_ifconfig_options() clears DNS servers for IPv4 already.
Signed-off-by: Simon Rozman <si...@rozman.si>
---
src/openvpn/tun.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index 8fd3229f..b1cd7a1b 100644
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -5281,7 +5281,6 @@ ip_addr_member_of(const in_addr_t addr, const
IP_ADDR_STRING *ias)
* Set the ipv6 dns servers on the specified interface.
* The list of dns servers currently set on the interface
* are cleared first.
- * No action is taken if number of addresses (addr_len) < 1.
*/
static void
netsh_set_dns6_servers(const struct in6_addr *addr_list,
@@ -5291,6 +5290,13 @@ netsh_set_dns6_servers(const struct in6_addr *addr_list,
struct gc_arena gc = gc_new();
struct argv argv = argv_new();
+ /* delete existing DNS settings from TAP interface */
+ argv_printf(&argv, "%s%s interface ipv6 delete dns %lu all",
+ get_win_sys_path(),
+ NETSH_PATH_SUFFIX,
+ adapter_index);
+ netsh_command(&argv, 2, M_FATAL);
+
for (int i = 0; i < addr_len; ++i)
{
const char *fmt = (i == 0) ?
--
2.28.0.windows.1
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