Can anyone shed any light on this?

[David@MPL]

I run a hobby site in my spare time (on a 1&1 home package) and after looking at the stats pages I have found the following as a referring URL:

172.16.0.76:15871/cgi-bin/afterWorkOptions.cgi

Doing a Whois on the IP address returns this:

Final results obtained from whois.arin.net.
Results:

OrgName: Internet Assigned Numbers Authority
OrgID: IANA
Address: 4676 Admiralty Way, Suite 330
City: Marina del Rey
StateProv: CA
PostalCode: 90292-6695
Country: US

NetRange: 172.16.0.0 - 172.31.255.255
CIDR: 172.16.0.0/12
NetName: IANA-BBLK-RESERVED
NetHandle: NET-172-16-0-0-1
Parent: NET-172-0-0-0-0
NetType: IANA Special Use
NameServer: BLACKHOLE-1.IANA.ORG
NameServer: BLACKHOLE-2.IANA.ORG
Comment: This block is reserved for special purposes.
Comment: Please see RFC 1918 for additional information.
Comment:
RegDate: 1994-03-15
Updated: 2002-09-12

OrgAbuseHandle: IANA-IP-ARIN
OrgAbuseName: Internet Corporation for Assigned Names and Number
OrgAbusePhone: +1-310-301-5820
OrgAbuseEmail: abuse@iana.org

OrgTechHandle: IANA-IP-ARIN
OrgTechName: Internet Corporation for Assigned Names and Number
OrgTechPhone: +1-310-301-5820
OrgTechEmail: abuse@iana.org

# ARIN WHOIS database, last updated 2006-04-10 19:10
# Enter ? for additional hints on searching ARIN's WHOIS database.

So, any ideas what this is? My site is www.odco.me.uk BWT.

Thanks in advance

[Duncan Rounding]

The 176.16.X.X is similiar to the range 192.168.X.X, both of which are reserved for private networks which are not connected directly to the internet.

Port 15871 is normally used as a proxy for the Websense Filtering Service to transmit block pages to users who try to access restricted websites.

It seems to me that Websense has blocked a corporate browser from seeing your site.

[David@MPL]

Ahhhh, thanks Duncan

Naughty people, they should be working

Cheers