Cambridge, Massachusetts-based Bolt Beranek & Newman Inc’s BBN Internet Services Corp will be offering a Pentium/Berkeley Unix-based Internet Server with Windows and Macintosh client software from the first quarter next year. Prices start from $9,900. Maintenance will cost $1,450 per month – Internet Site Patrol, a hardware, software and service firewall security package costs from $1,500 per month. Meanwhile, Paul Gudonis has been named chief executive of BBN Internet Services Corp. He had been vice-president and general manager, international for Electronic Data Systems Corp’s Communications Industry Group.