import bisect
 
def find_port(ports, target):
    """
    Returns the first integer in ports that equals the target or is greater.
    If there is no solution, returns -1.
 
    Args:
        ports (list): A sorted list of port numbers.
        target (int): The target port number.
 
    Returns:
        int: The first port number greater than or equal to the target, or -1 if not found.
    """
    # Find the insertion point for the target in the sorted list
    index = bisect.bisect_left(ports, target)
 
    # If the target is in the list or there's a port greater than the target, return it
    if index != len(ports):
        return ports[index]
 
    # If no port is greater than or equal to the target, return -1
    return -1

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