When I run this I can see that DNS port is open, that means that 10.1.1.236 is dns server??

root@kali:~# proxychains nmap -p 53 -sT -Pn 10.1.1.236 --open
ProxyChains-3.1 (http://proxychains.sf.net)

Starting Nmap 7.60 ( https://nmap.org ) at 2018-01-11 11:35 NZDT
|S-chain|-<>-127.0.0.1:8080-<><>-10.1.1.236:53-<><>-OK
Nmap scan report for 10.1.1.236
Host is up (0.21s latency).

PORT   STATE SERVICE
53/tcp open  domain

Nmap done: 1 IP address (1 host up) scanned in 0.31 seconds



If thats true then why does my DNS recon fail

root@kali:~# proxychains dnsrecon -r 10.1.1.1-10.1.1.254 -n 10.1.1.236
ProxyChains-3.1 (http://proxychains.sf.net)
[*] Reverse Look-up of a Range
[*] Performing Reverse Lookup from 10.1.1.1 to 10.1.1.254
[+] 0 Records Found
root@kali:~#






Then I run this command and it gives me these 2

root@kali:~# proxychains dnsrecon -r 10.1.1.1-10.1.1.254 -n 10.11.1.221
ProxyChains-3.1 (http://proxychains.sf.net)
[*] Reverse Look-up of a Range
[*] Performing Reverse Lookup from 10.1.1.1 to 10.1.1.254
[*] 	 PTR niky.it.thinc 10.1.1.224
[*] 	 PTR sean.it.thinc 10.1.1.246
[+] 2 Records Found





SO I DECIDE TO RUN THIS FROM SEAN
nano reverse.sh

#!/bin/bash

for ip in $(seq 1 254); do
	host 10.1.1.$ip
done




sean@sean:~$ ./reverse.sh
Host 1.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 2.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 3.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 4.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 5.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 6.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 7.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 8.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 9.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 10.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 11.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 12.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 13.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 14.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 15.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 16.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 17.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 18.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 19.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 20.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 21.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 22.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 23.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 24.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 25.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 26.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 27.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 28.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 29.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 30.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 31.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 32.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 33.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 34.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 35.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 36.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 37.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 38.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 39.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 40.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 41.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 42.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 43.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 44.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 45.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 46.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 47.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 48.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 49.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 50.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 51.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 52.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 53.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 54.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 55.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 56.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 57.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 58.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 59.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 60.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 61.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 62.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 63.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 64.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 65.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 66.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 67.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 68.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 69.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 70.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 71.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 72.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 73.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 74.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 75.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 76.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 77.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 78.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 79.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 80.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 81.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 82.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 83.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 84.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 85.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 86.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 87.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 88.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 89.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 90.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 91.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 92.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 93.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 94.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 95.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 96.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 97.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 98.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 99.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 100.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 101.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 102.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 103.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 104.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 105.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 106.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 107.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 108.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 109.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 110.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 111.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 112.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 113.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 114.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 115.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 116.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 117.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 118.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 119.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 120.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 121.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 122.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 123.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 124.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 125.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 126.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 127.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 128.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 129.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 130.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 131.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 132.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 133.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 134.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 135.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 136.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 137.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 138.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 139.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 140.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 141.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 142.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 143.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 144.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 145.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 146.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 147.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 148.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 149.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 150.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 151.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 152.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 153.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 154.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 155.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 156.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 157.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 158.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 159.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 160.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 161.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 162.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 163.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 164.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 165.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 166.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 167.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 168.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 169.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 170.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 171.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 172.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 173.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 174.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 175.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 176.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 177.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 178.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 179.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 180.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 181.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 182.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 183.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 184.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 185.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 186.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 187.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 188.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 189.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 190.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 191.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 192.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 193.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 194.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 195.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 196.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 197.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 198.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 199.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 200.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 201.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 202.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 203.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 204.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 205.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 206.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 207.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 208.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 209.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 210.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 211.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 212.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 213.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 214.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 215.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 216.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 217.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 218.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 219.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 220.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 221.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 222.1.1.10.in-addr.arpa not found: 5(REFUSED)
223.1.1.10.in-addr.arpa domain name pointer jeff.
224.1.1.10.in-addr.arpa domain name pointer niky.it.thinc.
Host 225.1.1.10.in-addr.arpa not found: 5(REFUSED)
226.1.1.10.in-addr.arpa domain name pointer joe.
Host 227.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 228.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 229.1.1.10.in-addr.arpa not found: 5(REFUSED)
230.1.1.10.in-addr.arpa domain name pointer kevin.thinc.
Host 231.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 232.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 233.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 234.1.1.10.in-addr.arpa not found: 5(REFUSED)
235.1.1.10.in-addr.arpa domain name pointer nina.
236.1.1.10.in-addr.arpa domain name pointer carrie.
Host 237.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 238.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 239.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 240.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 241.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 242.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 243.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 244.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 245.1.1.10.in-addr.arpa not found: 5(REFUSED)
246.1.1.10.in-addr.arpa domain name pointer sean.it.thinc.
247.1.1.10.in-addr.arpa domain name pointer cory.
248.1.1.10.in-addr.arpa domain name pointer _.
Host 249.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 250.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 251.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 252.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 253.1.1.10.in-addr.arpa not found: 5(REFUSED)
Host 254.1.1.10.in-addr.arpa not found: 5(REFUSED)
sean@sean:~$