---
src/openvpn/tun.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index 3ef79b2f..67d7664e 100644
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -238,6 +238,10 @@ do_set_mtu_service(const struct tuntap *tt, const short
family, const int mtu)
.family = family
};
strncpynt(mtu_msg.iface.name, tt->actual_name, sizeof(mtu_msg.iface.name));
+ if (family == AF_INET6 && mtu < 1280)
+ {
+ msg(M_INFO, "NOTE: IPv6 interface MTU < 1280 conflicts with IETF
standards and might not work");
+ }
if (!send_msg_iservice(pipe, &mtu_msg, sizeof(mtu_msg), &ack, "Set_mtu"))
{
@@ -5498,6 +5502,11 @@ windows_set_mtu(const int iface_index, const short
family,
const char *family_name = (family == AF_INET6) ? "IPv6" : "IPv4";
ipiface.Family = family;
ipiface.InterfaceIndex = iface_index;
+ if (family == AF_INET6 && mtu < 1280)
+ {
+ msg(M_INFO, "NOTE: IPv6 interface MTU < 1280 conflicts with IETF
standards and might not work");
+ }
+
err = GetIpInterfaceEntry(&ipiface);
if (err == NO_ERROR)
{
--
2.21.0.windows.1
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