DNS

The three DNS servers have recently been upgraded to BIND9. A DNS secondary is held at another UK university site.

PKI

The department has at least 10 SSL certificates from Thawte, including Web-signing certificates. No personal certificates are supported by the department (though users may have their own).

NTP

The JANET NREN offers several stratum 0 NTP servers. The department also has a GPS-based NTP server built-in to its own RIPE NCC test traffic server.

USENET news

The news feed is delivered using dnews.

Multicast

There is PIM-SM IPv4 multicast via a dedicated Cisco 7206 router. This supports applications including the IPv4 AccessGrid conferencing system. A number of bugs in the Alcatel equipment prevent heavy use of IPv4 multicast within the department network (thus an IPv6 multicast solution is highly desirable). An IPv4 multicast beacon is used for monitoring multicast.

Remote login

Remote login access is offered via ssh, with sftp for file transfer. Remote use of telnet and ftp is denied by the firewall.

File serving

The main file servers are SGI systems, hosting large (multi-TB) standalone RAID arrays. The files are offered via NFS and Samba to client systems.

The content distribution server is hosted on such a system (e.g. containing MS software licensed under the Campus Agreement).