Hosting of IRC is prohibited. Ports 6666 and 6667 are closed.
The reason is that the software is often used to control botnets.
Knowledgebase
Adult content, pornography, and erotic websitesUnlicensed contentGame servers on VPSProxy, VPN, TOR, and similar servicesHacker softwareFraudulent software and projectsTorrent clients and trackersCryptocurrency (Bitcoin, etc) mining softwareGamblingHYIPTDSPharmaceutical productsFinancial pyramidsIRC servers and clients