MTU errors
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Hello all,
I am using a pfSense box with a VPN service. I am contemplating using different ones. I am using VPN Express and on certain servers the config works and I get no errors in the OpenVPN logs. But I switched to another one of their servers and I got the following errors:
Feb 10 00:05:58 openvpn[24030]: WARNING: 'link-mtu' is used inconsistently, local='link-mtu 1542', remote='link-mtu 1546'
Feb 10 00:05:58 openvpn[24030]: WARNING: 'mtu-dynamic' is present in remote config but missing in local config, remote='mtu-dynamic'
Again, on another one of their servers I get no errors. How do I fix this particular error?
Thanks
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I changed the local config file so that the mtu value matches the warning but that then generates a similar tun-mtu error.
I got a different error below when I changed the mtu to 1500
Feb 10 00:32:37 openvpn[87806]: WARNING: 'link-mtu' is used inconsistently, local='link-mtu 1500', remote='link-mtu 1546'
Feb 10 00:32:37 openvpn[87806]: WARNING: 'tun-mtu' is used inconsistently, local='tun-mtu 1458', remote='tun-mtu 1500'
Feb 10 00:32:37 openvpn[87806]: WARNING: 'mtu-dynamic' is present in remote config but missing in local config, remote='mtu-dynamic'Here is the local config? I can't see the server side since its on VPN Express.
dev tun
fast-io
persist-key
persist-tun
replay-persist cur-replay-protection.cache
nobind
remote x.x.x.x
remote-random
pull
comp-lzo
tls-client
tls-remote server
ns-cert-type server
verb 3
key-direction 1
route-method exe
route-delay 2
tun-mtu 1500
fragment 1300
mssfix 1450 -
I am experiencing the same problem.
I have my pfSense box connected to StrongVPN and I see this in the logs:
WARNING: 'link-mtu' is used inconsistently, local='link-mtu 1558', remote='link-mtu 1562'
WARNING: 'mtu-dynamic' is present in remote config but missing in local config, remote='mtu-dynamic'When I put tun-mtu 1500 in the Custom Options, like you the warning changes.