nanog mailing list archives
Re: New IPv4 Allocation to ARIN
From: jlewis () lewis org
Date: Fri, 16 Jan 2004 17:31:16 -0500 (EST)
On Fri, 16 Jan 2004, Petri Helenius wrote:
I wouldn't be surprised if more people are filtering 69/8 now than before, roughly 40% of the spam hitting my servers is from there.
That's likely going to be true of each newly allocated block as spammers move around, move into them, or even scam the RIRs into allocating IPs directly to them.
It also seems that 69box.atlantic.net (or someone nearby) is filtering one specific size of ICMP packets. Is certain packet size also considered a "bogon" or is this something that will eventually be removed from the filters?
It's those dang Nachi-sized ICMP echo/echo-replies. We block those at all our transit points and dial-up ports. Nachi was killing our cisco access-servers until we did this to stop the spread. Unfortunately, this breaks Windows tracert as it uses 92-byte echo requests. Use a "real" traceroute, and you won't see this problem. ---------------------------------------------------------------------- Jon Lewis *jlewis () lewis org*| I route Senior Network Engineer | therefore you are Atlantic Net | _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
Current thread:
- Re: New IPv4 Allocation to ARIN, (continued)
- Re: New IPv4 Allocation to ARIN Rob Thomas (Jan 19)
- Re: New IPv4 Allocation to ARIN william (Jan 19)
- Re: New IPv4 Allocation to ARIN william (Jan 19)
- Re: New IPv4 Allocation to ARIN Richard A Steenbergen (Jan 19)
- Re: New IPv4 Allocation to ARIN Owen DeLong (Jan 19)
- Re: New IPv4 Allocation to ARIN william (Jan 19)
- 1/8 and 2/8 (was Re: New IPv4 Allocation to ARIN) John Palmer (Jan 19)
- Re: 1/8 and 2/8 (was Re: New IPv4 Allocation to ARIN) Petri Helenius (Jan 19)
- Re: New IPv4 Allocation to ARIN Petri Helenius (Jan 16)
- Re: New IPv4 Allocation to ARIN jlewis (Jan 16)
- Re: New IPv4 Allocation to ARIN william (Jan 16)
- Nachi (was Re: New IPv4 Allocation to ARIN) Michael Lewinski (Jan 16)
- Re: New IPv4 Allocation to ARIN Petri Helenius (Jan 18)
- Re: New IPv4 Allocation to ARIN Pete Templin (Jan 18)
- Re: New IPv4 Allocation to ARIN Petri Helenius (Jan 18)
- Re: New IPv4 Allocation to ARIN william (Jan 19)
- Re: New IPv4 Allocation to ARIN Pete Templin (Jan 19)