nanog mailing list archives
Re: rfc1978 help
From: Jeroen Massar <jeroen () unfix org>
Date: Fri, 05 Nov 2004 19:32:27 +0100
On Sat, 2004-11-06 at 02:07 +0800, adrian kok wrote:
Hi all Sth I want to clarify: 1/ 240.0.0.0/5 - Class E Reserved 248.0.0.0/5 - Unallocated Sometimes I got it should /4 or /5 ? 240.0.0.0/4 - Class E Reserved 248.0.0.0/4 - Unallocated
Look at the official list(tm): http://www.iana.org/assignments/ipv4-address-space
2/ Can I block it in the firewall for "255.255.255.255/32 - Broadcast"? deny ip from any to 255.255.255.255/32 deny ip from 255.255.255.255/32 to any
You can block anything you like
3/ I got the following. ls it normail? why there is connection to the broadcast address tcp 0 1 202.64.230.8:33397 192.168.255.255:25 SYN_SENT
255.255 or anything ending in 255 doesn't need to be a broadcast interface. Welcome to the wonderful world of CIDR :) I guess you might want to take a look at: http://www.cymru.com/Bogons/index.html Greets, Jeroen
Attachment:
signature.asc
Description: This is a digitally signed message part
Current thread:
- Re: Network Monitoring System - Recommendations? Joe Shen (Oct 31)
- Re: Network Monitoring System - Recommendations? Alexei Roudnev (Nov 01)
- Re: Network Monitoring System - Recommendations? Joe Shen (Nov 01)
- Message not available
- Re: Network Monitoring System - Recommendations? Alexei Roudnev (Nov 01)
- Re: Network Monitoring System - Recommendations? Alexei Roudnev (Nov 01)
- Re: Network Monitoring System - Recommendations? Joe Shen (Nov 01)
- Re: Network Monitoring System - Recommendations? Alexei Roudnev (Nov 01)
- <Possible follow-ups>
- Re: Network Monitoring System - Recommendations? Richard J. Sears (Nov 04)
- RE: Network Monitoring System - Recommendations? Charlie Khanna - NextWeb (Nov 04)
- Re: Network Monitoring System - Recommendations? Chris A. Epler (Nov 05)
- rfc1978 help adrian kok (Nov 05)
- Re: rfc1978 help Jeroen Massar (Nov 05)
- Re: rfc1978 help Jess Kitchen (Nov 05)
- Message not available
- Re: rfc1978 help Jeroen Massar (Nov 05)
- Re: Network Monitoring System - Recommendations? Chris A. Epler (Nov 05)