inet mtu

Hi,

Could anyone tell me what is ' inet mtu xxxxx ' in nokia firewall. When we type the command ifconfig -a in a nokia firewall, the interfaces displayed contains ' inet mtu some no '

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bzdziagwa

Im not sure what you are asking for.
The interface MTU depends on network to which this interface belongs.
Default value is 1500 as I remember.

Regards
B.

Munck

MTU (Maximum Transmission Unit) is the maximum size in bytes that a packet can be for it to be transportable on a particular network. Default for an ethernet network is, as bzdziagwa mentioned, 1500 bytes.

If a packet initially is bigger than 1500 bytes, it must be fragmented to comply with the maximum MTU allowed. If fragmentation is not allowed (DF flag in TCPDump) the traffic will not make it through.

A lot of attacks depends on fragmentation to work, so it's wise to do some reseach on the matter

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