Hi all,
Recently we change from internet provider. Now we have issues with our Sophos configuration.
Our configuration is:
External WAN, MTU size of 1460 required
Internal LAN, configured as Ethernet Static
The problem now is that the connection to the internet from a device that is connected to the LAN, is broken. The default value of MTU=1500 is to high. We need to lower the MTU value on all devices.
Symptoms that we have are described in this article.
On computers the MTU size can be changed, but is not nice to do.
This is not possible for devices like televisions with ethernet connection.
Is it possible to configure the Internal LAN in that way that devices can connect with a MTU value of 1500, but that the size is changed in the route to External WAN?
I tried to change the MTU value with command IP ROUTE CHANGE, but this didn't help. Current output of IP ROUTE SHOW
10.120.0.0/16 dev eth1 proto ipsec scope link src 10.121.1.1
10.121.1.0/24 dev wlan1 proto kernel scope link src 10.121.1.1
127.0.0.0/8 dev lo scope link
172.16.0.0/12 dev eth1 proto ipsec scope link
172.16.28.0/24 dev wlan0 proto kernel scope link src 172.16.28.1
185.54.180.248/29 dev eth1 proto kernel scope link src 185.54.180.250
192.168.5.0/24 dev eth1 proto ipsec scope link src 10.121.1.1
192.168.8.0/24 via 192.168.8.1 dev br0 mtu 1460
192.168.171.0/24 dev br0 proto kernel scope link src 192.168.171.1
eth1 is our WAN connection.
br0 is our LAN connection.
Please help me out.
Kind regards,
Remko
This thread was automatically locked due to age.
