For those who are going to setup their own Craigslist Proxy, making sure your IPs are from different C class IP ranges is something you should pay special attention to. It isn't a topic that is discussed often, but by not making sure you are using IPs on your proxy server from different C class IP ranges you are opening the door to be blocked by Craiglsist.
IPs are seperated into four ranges, A B C and D. These ranges are used to identify the network and network ID. Everyone on the internet is assigned an IP which is used to identify them while they are online. Most people know that by going offline and then back online you are able to change your IP, but most of the time the new IP your ISP gives you is still within the same range. This allows companies and other people to more easily identify your activities as even after changing your IP, it has not been changed to the extent that they are unable to make any connection between your old and new IP. It is more than possible that this is exactly what Craigslist uses as part of their system to filter out spam. Making sure your proxy server has IPs from different C class IP ranges helps to prevent this problem.
As already stated above, not changing your IP significantly may mean Craigslist is able to make a connection between two or more accounts you use to post on Craigslist with even after you change your IP (as the new IP you are assigned has not changed enough to make you look like a completely different user from somewhere else). Be sure that your proxy server is able to get IPs from different C class IP ranges to help avoid this problem. Generally speaking, IPs that are assigned to proxy servers are normally within the same C class range, try to make sure this is not the case for your proxy server. Anonymity is very important for anyone posting on Craigslist, be sure to ask about getting IPs on your Craigslist Proxy from different ranges.
7 months ago