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We are providing a list of IP addresses used by host-tracker.com to monitor uptime on sites. Host-tracker.com's service can be used for nefarious purposes, and considering many people monitor their sites using their own tools (such as Nagios), not everyone wants third parties randomly probing without permission.
This list can be easily used in iptables rules, or in firewall ACLs.
# host-tracker.com monitoring IPs 12.204.164.120 61.47.2.183 64.191.15.181 64.191.99.104 64.85.163.58 64.85.163.59 65.60.49.173 66.197.227.199 66.7.204.115 66.7.209.19 66.7.218.78 66.79.180.226 67.214.175.26 67.228.134.96 67.228.169.92 67.23.228.117 69.10.44.219 69.10.46.114 69.10.51.10 69.10.52.130 69.175.78.42 69.197.139.250 69.90.109.4 70.32.40.194 #70.38.121.154 70.86.109.18 72.232.160.162 72.44.92.220 74.220.53.198 74.63.219.194 74.63.64.25 74.81.166.10 74.81.172.39 74.86.117.10 74.86.158.36 77.120.118.155 77.120.121.80 77.222.40.215 78.110.160.250 78.46.86.12 80.191.107.188 80.82.220.177 81.176.237.2 82.147.16.130 84.19.171.211 85.119.158.129 85.31.97.57 86.124.34.203 86.124.34.206 87.117.243.140 87.118.127.40 87.118.83.127 87.236.194.130 89.19.3.66 89.253.195.111 91.121.11.148 91.121.170.138 91.194.77.75 91.200.40.32 91.203.133.169 91.204.73.47 91.205.174.97 91.209.206.48 91.209.206.81 91.211.117.50 91.218.37.10 92.53.113.10 94.229.22.101 94.23.211.47 94.23.34.41 94.23.53.51 95.168.183.195 96.9.176.117 96.31.74.66 98.142.241.18 98.142.242.90 98.158.186.110 109.169.10.170 112.137.162.132 115.124.113.19 173.0.48.216 173.192.48.81 173.212.253.4 173.244.169.38 174.120.222.233 174.121.207.2 174.133.142.138 174.133.78.250 174.136.55.4 174.142.136.150 174.142.214.72 174.142.82.87 174.36.197.76 174.37.113.104 178.162.185.15 178.63.141.0 178.63.64.194 178.208.83.7 178.216.48.151 184.82.95.82 184.82.95.90 184.82.95.98 188.40.44.195 188.40.68.114 193.111.49.3 193.169.188.88 193.219.118.103 193.9.28.101 195.12.38.41 195.16.88.3 195.138.198.21 195.206.252.3 201.33.21.239 202.190.177.165 203.194.205.251 204.10.39.52 204.27.61.98 204.74.223.155 207.7.92.143 208.43.112.226 208.53.183.237 208.72.155.154 208.79.93.209 208.79.93.240 208.84.146.48 208.89.215.235 #209.172.34.52 209.62.88.194 210.17.251.24 212.124.109.26 213.133.123.40 213.147.115.131 213.151.2.85 213.186.117.20 216.67.243.26 217.14.208.210 217.199.218.198
