-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of Josh Richards Sent: June 14, 2001 11:23 AM To: nanog@merit.edu Subject: Re: What is up with 170.36.0.0/16
Just what it says. They don't appear to be announcing their block. :-) (same results here from several boxes I checked, BTW)
Note though that only two of their MX boxes are in that block:
fleet.com preference = 30, mail exchanger = bkb-bh.bkb.com fleet.com preference = 40, mail exchanger = testmail.fleet.com fleet.com preference = 10, mail exchanger = sweeper.bkb.com fleet.com preference = 20, mail exchanger = walmail.bkb.com fleet.com preference = 10, mail exchanger = mail2.fleet.com fleet.com preference = 20, mail exchanger = bosmail.bkb.com fleet.com preference = 20, mail exchanger = fleet-cp.fleet.com fleet.com nameserver = dnsauth3.sys.gtei.net fleet.com nameserver = dnsauth1.sys.gtei.net fleet.com nameserver = dnsauth2.sys.gtei.net bkb-bh.bkb.com internet address = 204.167.53.66 testmail.fleet.com internet address = 170.36.73.48 sweeper.bkb.com internet address = 155.182.19.38 walmail.bkb.com internet address = 32.97.32.201 mail2.fleet.com internet address = 170.36.73.11 bosmail.bkb.com internet address = 204.167.53.91 fleet-cp.fleet.com internet address = 199.95.175.66 dnsauth3.sys.gtei.net internet address = 4.2.49.4 dnsauth1.sys.gtei.net internet address = 4.2.49.2 dnsauth2.sys.gtei.net internet address = 4.2.49.3
Have you tried contacting the technical contact listed in the WHOIS record? Or perhaps GTEI (Genuity) who appears to be their service provider?
Are you sure this couldn't be intentional? I've once seen a setup where you had the lowest-priority MX (by that, I mean the one with the lowest number, in case my wording is ambiguous or contradictory) being some host with an RFC 1918 IP, and then there was a higher-priority MX which was their NAT box. I'm guessing (I never sent mail there, or worked with this setup, thank god) that the idea was that connections to the RFC 1918 box would die, so remote MTAs would contact the NAT box and deliver there. The NAT box would then try to relay to the primary MX, and since it would obviously have an interface into the network with the RFC 1918 IPs, it would be able to deliver. This place doesn't seem to be using this setup anymore, although amusingly enough most of their NS records point to machines with 10.200 IPs. I agree that this type of thing is entirely dumb, but is there any reason that the network mentioned by the original poster couldn't be doing the same thing? Many large corporations that have been running IP networks since before Wall Street knew the meaning of the word Internet have different real blocks of IP space (usually in the class B space) for their "public" network and their corporate network... You may also want to take a look at this: vivienm@citrine:~$ whois -a 170.36.73.11 Fleet Services Corporation (NET-FLEET) Mail Stop NY/KP/0104 Peter D. Kiernan Plaza Albany, NY 12207 US Netname: FLEET Netblock: 170.36.0.0 - 170.36.255.255 Maintainer: FSCO Coordinator: Ryan, Tom (TR23-ARIN) postmaster@FLEET.COM (518) 447-2241 Record last updated on 02-Feb-2001. Database last updated on 13-Jun-2001 23:03:57 EDT. The ARIN Registration Services Host contains ONLY Internet Network Information: Networks, ASN's, and related POC's. Please use the whois server at rs.internic.net for DOMAIN related Information and whois.nic.mil for NIPRNET Information. It seems slightly odd to me that this block seems to have no DNS servers listed for reverse lookups if it is in public use. Vivien -- Vivien M. vivienm@dyndns.org Assistant System Administrator Dynamic DNS Network Services http://www.dyndns.org/