I was curious to know how much IPv4 address space Facebook actually has. I assumed that they run a large server cluster on their own, but you can’t be too sure.
So I ran a whois on Facebook’s frontend IPv4 address for www.facebook.com:
OrgName: Thefacebook.com
OrgID: THEFA-3
Address: 156 University Ave, 3rd floor
City: Palo Alto
StateProv: CA
PostalCode: 94301
Country: US
NetRange: 69.63.176.0 - 69.63.191.255
CIDR: 69.63.176.0/20
NetName: TFBNET2
NetHandle: NET-69-63-176-0-1
Parent: NET-69-0-0-0-0
NetType: Direct Assignment
NameServer: DNS1.SCTM.TFBNW.NET
NameServer: DNS2.SCTM.TFBNW.NET
NameServer: DNS04.SF2P.TFBNW.NET
NameServer: DNS05.SF2P.TFBNW.NET
[...]
# ARIN WHOIS database, last updated 2008-11-23 19:10
I then ran a scan of their entire IPv4 address block, 4096 IPv4 address in total, and only 421 are used. Even if you subtract 16 IPv4 address for the necessary broadcast addresses, then that’s still a pretty low usage percentage (421/4080 is about 10%).
I guess I really shouldn’t be surprised, most companies are like this. They grab up quite a few blocks and then blame other people for the lack of IPv4 addresses. Although IANA did reserve quite a few addresses for internal networks (about 18 million) and multicast addresses (about 16 million which don’t even route properly most of the time). That still leaves 4, 260, 967, 296 addresses though (2^32 - 34 million). Enough for much of the developed world. Well whatever happens, I just hope the transition over to IPv6 makes public Internet Protocol addresses available to more people in the digital industries. Heck 2^128 addresses is more than enough for everyone to have quite a few of their own IPv6 addresses. The only problem with that though is the routability issues caused by dividing up the public Internet into so many pieces.
The interesting thing that I found out from running a scan of Facebook’s IPv4 block is that they created a group debt tracker application called MoochSpot.
Internet
Facebook, IPv4, MoochSpot
| Response (Student Help West) |
11/21/2008 11:42 AM |
| Hello Jason-
At this time we do not currently support IMAP or POP for the student web mail. The only option I can offer is to have your student e-mail forward to a different account (i suggest google since they do allow IMAP and POP configuration), and then retrieve it that way.
If there are any other questions, please contact us again!
Thanks!
-Dan Shipley- |
| Customer (Jason Zerbe) |
11/21/2008 09:47 AM |
Is there a way to access my century email account via imap4 or pop3? It would make things more convenient than always having to use the Outlook Web Access interface.
Thanks for your time, Jason Zerbe |
Simply shocking! This is a college mind you.
Internet
Century College
This year I am enrolled in the PSEO program at Century college. To keep up with what is going on at my high school, I subscribed to the Woodbury High School events mailing list. Oddly enough, the host it was coming from was none other than a host in the domain of trend micro. So I did a quick DNS query and found out that the South Washington County schools (District 833) are using an off site hosted email solution from Trend Micro called, InterScan™ Messaging Hosted Service.
blackbox:~# host --anything sowashco.k12.mn.us
sowashco.k12.mn.us A 63.225.128.3
sowashco.k12.mn.us MX 10 in.sjc.mx.trendmicro.com
!!! sowashco.k12.mn.us MX host in.sjc.mx.trendmicro.com is not canonical
sowashco.k12.mn.us NS authns1.mpls.qwest.net
sowashco.k12.mn.us NS authns2.dnvr.qwest.net
sowashco.k12.mn.us NS authns3.sttl.qwest.net
sowashco.k12.mn.us SOA authns1.mpls.qwest.net dns-admin.qwestip.net (
2007092800 ;serial (version)
10800 ;refresh period (3 hours)
3600 ;retry interval (1 hour)
604800 ;expire time (1 week)
86400 ;default ttl (1 day)
)
I had been meaning to check into District 833’s (url filtration) methods for quite some time, so I would be able to figure out similar ways of imaging and control of the six (operational) machines on my Local Area network.
The statistics on their network, according to a testimonial posted on Trend Micro’s website:
- fiber optic switches that connect all 24 school district sites together
- 3,000+ workstations
- 30,000 spyware and virus accomplice hits every day (during the school year)
- 650,000 messages a day about 640,000 of those messages are spam
[Dietsche] continued, “When any end user logs on to a workstation, InterScan Web Security Suite checks the Active Directory to verify that the user is authorized to be on the network. Verification is instantaneous and scanning begins without the end user even knowing it.” Dietsche also can track events by user accounts. “This is a huge advantage for the IT staff,” he said. “In the past, we found it difficult to isolate a security issue. But now, LDAP authentication enables us to get log reports that identify who the affected users are and which of them are constantly running into viruses.”
I thought that was way cool how all of these solutions can come together in one cohesive structure.
Internet, School, Software
trend micro