From: Charles Church (cchurch@wamnet.com)
Date: Mon Jun 16 2003 - 10:53:01 GMT-3
M$ Windows networking uses directed broadcasts quite a bit as well.
Chuck Church
CCIE #8776, MCNE, MCSE
Wam!Net Government Services
13665 Dulles Technology Dr. Ste 250
Herndon, VA 20171
Office: 703-480-2569
Cell: 585-233-2706
cchurch@wamnet.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?search=chuck+church&op=index
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
Jung, Jin
Sent: Monday, June 16, 2003 9:35 AM
To: 'Chen Kwong Wai William'; ccielab@groupstudy.com
Subject: RE: ip directed-broadcast
This command disables local broadcast on that segments.
You want to disable this to prevent some sort of DOS attack on your network,
With this command enables, someone can ping or send packets to broadcast
address,
Let's say 172.16.90.0/24 network local broadcast address is 172.16.90.255.
In some case you need to enable this command, -- multicast, bootP,....
Jin jung....
-----Original Message-----
From: Chen Kwong Wai William [mailto:kwchen@netvigator.com]
Sent: Monday, June 16, 2003 5:11 AM
To: ccielab@groupstudy.com
Subject: ip directed-broadcast
Dear all,
Can anyone kindly explain to me what actually does, if I configure "no
ip directed-broadcast" on an Interface? Thx a lot.
For example:
(192.168.1.0/24) - (E0) Router (E1) - (192.168.2.0/24)
Suppose, if directed broadcast is enable on E0, but disabled on E1,
then:
1) From 192.168.1.0, "ping 192.168.2.255" will be blocked?
2) From 192.168.2.0, "ping 192.168.1.255" will be blocked?
Best Regards,
William Chen
Best Regards,
William Chen
This archive was generated by hypermail 2.1.4 : Fri Jul 04 2003 - 11:10:59 GMT-3