Re: traceroute as a flooder

From: Stefan `Sec` Zehl (secat_private)
Date: Thu Feb 18 1999 - 14:18:01 PST

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    On Tue, Feb 16, 1999 at 03:30:13PM -0800, Curt Sampson wrote:
    > [ traceroute patch ]
    >     1. If uid != 0 (you're not superuser), it checks to see that
    >     the source address it's going to use is an address from a local
    >     interface that's up and not marked loopback.
    
    While I agree with most other changes, I do not see why zou should
    forbid loopback if's for the source address. I know several boxes which
    are multi-homed, and use loopback interfaces to respond to these ip's
    like this:
    
    [snip from my /etc/rc.local]
    
    myarp="05:ec:12:de:c0:de"
    if_no=0
    echo -n 'configuring loopbacks:'
    for ip in 10.10.10.1 10.10.10.10 10.10.10.23 10.10.10.42; do
      if_no=`expr $if_no + 1`
      ifconfig lo$if_no $ip netmask 0xffffffff
      arp -s $ip $myarp pub
      echo -n " $ip"
    done
    echo '.'
    
    As I see it, i would not be able to use thes IP's for traceroutes
    anymore, which is IMHO a bad thing.
    
    
    CU,
        Sec
    --
    Ich gehe sogar noch weiter, ich verwende "Sicherheit" nun im Zusammenhang mit:
    Kochplatten, Toaster und Motorsaegen. 8)      -- <schwarziat_private-luebeck.de>
    



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