diff options
Diffstat (limited to 'openvpn.8')
| -rw-r--r-- | openvpn.8 | 31 |
1 files changed, 30 insertions, 1 deletions
@@ -4169,7 +4169,7 @@ adapter manually and indicating the IP/netmask which OpenVPN expects the adapter to be set to. .B dynamic [offset] [lease-time] -- -(Default) Automatically set the IP address and netmask by replying to +Automatically set the IP address and netmask by replying to DHCP query messages generated by the kernel. This mode is probably the "cleanest" solution for setting the TCP/IP properties since it uses the well-known @@ -4220,6 +4220,35 @@ that it works okay in practice. If you use this option, it is best to leave the TCP/IP properties for the TAP-Win32 adapter in their default state, i.e. "Obtain an IP address automatically." + +.B adaptive -- +(Default) Try +.B dynamic +method initially and fail over to +.B netsh +if the DHCP negotiation with the TAP-Win32 adapter does +not succeed in 20 seconds. Such failures have been known +to occur when certain third-party firewall packages installed +on the client machine block the DHCP negotiation used by +the TAP-Win32 adapter. +Note that if the +.B netsh +failover occurs, the TAP-Win32 adapter +TCP/IP properties will be reset from DHCP to static, and this +will cause future OpenVPN startups using the +.B adaptive +mode to use +.B netsh +immediately, rather than trying +.B dynamic +first. To "unstick" the +.B adaptive +mode from using +.B netsh, +run OpenVPN at least once using the +.B dynamic +mode to restore the TAP-Win32 adapter TCP/IP properties +to a DHCP configuration. .\"********************************************************* .TP .B --route-method m |