Limit DHCP requests with iptables - problem: Router

[Simon Hobson]

Michal Suchanek wrote:

>Alternatively, there is the string module. Not sure about the exact
>syntax, the documentation is not very specific. Probably something
>like:
>  iptables -A INPUT -p udp --dport 67 -m string --from 28 --to 34
>--hex-string aabbccddeeff

<pedant>And don't forget that this field is SIXTEEN octets long, not 
SIX. Working with a subfield and assuming the rest is blank is how 
certain classes of error creep in.</pedant>

-- 
Simon Hobson

Visit http://www.magpiesnestpublishing.co.uk/ for books by acclaimed
author Gladys Hobson. Novels - poetry - short stories - ideal as
Christmas stocking fillers. Some available as e-books.