We ran nmap with the following commands:

Command:

$ sudo nmap -sS 10.0.23.0/28

Outcome (condensed):

Starting Nmap 6.47 ( http://nmap.org ) at 2014-10-19 22:32 CEST
Nmap scan report for osw004.sittingduck.bv (10.0.23.37)
Host is up (0.034s latency).
Not shown: 998 filtered ports
PORT    STATE SERVICE
80/tcp  open  http
443/tcp open  https
Nmap scan report for 10.0.23.101
Host is up (0.016s latency).
All 1000 scanned ports on 10.0.23.101 are filtered
Nmap scan report for aud028.sittingduck.bv (10.0.23.105)
Host is up (0.014s latency).
All 1000 scanned ports on aud028.sittingduck.bv (10.0.23.105) are filtered
Nmap scan report for monitoring28.sittingduck.bv (10.0.23.166)
Host is up (0.061s latency).
Not shown: 998 filtered ports
PORT    STATE SERVICE
80/tcp  open  http
443/tcp open  https
Nmap done: 12 IP addresses (4 hosts up) scanned in 102.34 seconds

Command:

$ nmap -A -Pn 172.16.1.0/24

Outcome (Condensed):

Nmap scan report for osw06.sittingduck.bv (172.16.1.94)
Host is up (0.28s latency).
Not shown: 998 filtered ports
PORT    STATE SERVICE VERSION
80/tcp  open  http    nginx
443/tcp open  http    nginx
Nmap scan report for 172.16.1.103
Host is up (0.39s latency).
Not shown: 999 filtered ports
PORT    STATE  SERVICE VERSION
Nmap scan report for 172.16.1.106
Host is up (0.31s latency).
Not shown: 999 filtered ports
PORT    STATE  SERVICE VERSION
646/tcp closed ldp
Nmap scan report for 172.16.1.105
Host is up (0.28s latency).
Not shown: 999 filtered ports
PORT    STATE  SERVICE VERSION
179/tcp closed bgp
Nmap scan report for monitoring17.sittingduck.bv (172.16.1.109)
Host is up (0.28s latency).
Not shown: 998 filtered ports
PORT    STATE SERVICE  VERSION
80/tcp  open  http     Apache httpd 2.2.3
443/tcp open  ssl/http Apache httpd 2.2.3
Nmap scan report for ns3.sittingduck.bv (172.16.1.115)
Host is up (0.27s latency).
Not shown: 999 filtered ports
PORT   STATE SERVICE VERSION
53/tcp open  domain

Command:

$ nmap -A -Pn 172.16.4.0/24

Outcome (condensed):

Nmap scan report for 172.16.4.23
Host is up (0.23s latency).
Not shown: 999 filtered ports
PORT    STATE  SERVICE VERSION
179/tcp closed bgp
Nmap scan report for osw00.sittingduck.bv (172.16.4.27)
Host is up (0.24s latency).
Not shown: 998 filtered ports
PORT    STATE SERVICE VERSION
80/tcp  open  http    nginx
443/tcp open  http    nginx
Nmap scan report for 172.16.4.253
Host is up (0.23s latency).
Not shown: 998 filtered ports
PORT    STATE SERVICE  VERSION
80/tcp  open  http     Apache httpd 2.2.15
443/tcp open  ssl/http Apache httpd 2.2.15
Nmap scan report for 172.16.4.254
Host is up (0.24s latency).
Not shown: 998 filtered ports
PORT    STATE SERVICE  VERSION
80/tcp  open  http     Apache httpd 2.2.15     
443/tcp open  ssl/http Apache httpd 2.2.15     

Nothing relevant was reported.