Methods, systems, and media for modifying firewall rules based on dynamic Internet Protocol (IP) addresses are provided. In some embodiments, the method comprises: receiving, from a database server, a request to modify a firewall rule of a firewall protecting a remote computer, wherein the request includes an IP address of a user device initiating a connection to the remote computer, and wherein the firewall rule indicates IP addresses of devices allowed to establish connections to the remote computer; determining whether the IP address of the user device is to be added to the firewall rule; and in response to determining that the IP address of the user device is to be added to the firewall rule, adding the current IP address to the firewall rule.