linux mtu setting

[michaelreef]

How do I change the default mtu on ubuntu from 1500 to 1492? At 1500 many internet sites do not load properely, I am using an adsl router.

At the moment I can change it with the following command:

sudo /sbin/ifconfig eth0 mtu 1492

However, this is temporary and after a restart the default of 1500 is back.

 

[DavidDB]

http://www.debianhelp.co.uk/mtu.htm

or write a script and place it in /usr/local/bin and call it from /etc/rc2.d

 

[fskmh]

I tried setting MTU to 1492 as well, made no obvious difference to me.
I am on TI so using cache.saix.net as squid's upstream proxy definitely makes a difference (even though the proxy sometimes appears to be down). When the proxy is not responding I just select "direct connection" in Firefox settings and use wget with "--no-cache".