Although AuroraChan was the base of operations for the Aurorafurries the limitation of a single board and frequent deletions of collections led to the need for a separate website. The first attempt for a separate website failed shortly after its creation so the Aurorafurries turned to Image Board 4 Free, a website that used to allow users to create their own *Chan websites for free off custom ImageBoard software, where an AuroraChan furry Filthy had previously set up a board. Jay, the previous owner of U-18Chan, joined Filthy in creating the new Chan. They named it FilthySlothChan, a portmanteau of their usernames (one of Jay's aliases was AlienSloth Man). The website consisted of four boards: /fur/ - Furries, /c/ - Comics, /s/ - Sexy Beautiful Women, and /lo/ - Lounge today three of those boards still exist: /fur/, /c/ and /lo/ although they have since been joined by many other boards.

With multiple boards for furries compared to AuroraChan's one, users had slowly been moving across to FilthySlothChan so Jay suggested to Filthy that they approach Serpentor about making FilthySlothChan the new new official home of the Aurorafurries. While the IB4F site had been growing in popularity its regular 4Chan raids had on several occasions required it to change it's name (changing the site's name changed its URL) to avoid DDoS attacks from slowing all of IB4F and possibly having their site deleted by IB4F's owner, Infinitus. When the site became the home of the Aurorafurries it was called U-18Chan, as a joke about submarines because the site was hiding from 4Chan retaliative attacks. Sometime after the userbase moved across the /fur/ board on AuroraChan was deleted. Over time with growing popularity and a dedicated site on IB4F U-18Chan acquired its own domain which it still uses today. Unfortunately, with many other chans on IB4F dodging DDoS attacks and others hosting such dubious content as to warrant police attention, IB4F went down first on Tuesday 7th July 2009 after Bunkerchan brought the site offline for two days then legal problems took it offline for months.

E621 HIGH TAIL HALL 2 FULL INSTALLĪfter a failed reboot of IB4F, U-18Chan was forced to move to a VPS and a fresh install of Kusaba X instead of the previously used custom IB4F software. Performance issues caused by a high volume of traffic moved U-18Chan to a dedicated machine but with problems persisting and the server reaching the point of crashing permanently Jay contacted Infinitus, who had helped previously, who gave Jay the IB4F software. On July 28th 2011 U-18Chan starting running IB4F which it has been running off since. Unfortunately due to a 'power surge' at our old datacenter our whole server was killed drives and all. I attempted for weeks to work with the company to recover our data off those disks however, they were no help and claimed they were unable to insert the hard drives into another machine so I could rip the data off them.

E621 high tail hall 2 full