Dos and Don'ts of being on the departmental network
Or, how to keep your IP address
This is a short and simple guide about how to behave on the departmental network. It can't tell you everything but it may help prevent some of the more common mistakes and misconfigurations. It is definitely not a substitute for the official network rules (see below). If in any doubt about how to set something up, please ask the Computer Officers before experimenting. You can mail us at support@ch.cam.ac.uk.
- Do be aware of the network rules. Most of them are obvious from common sense, but always check first if in doubt or before doing anything unusual as your actions may affect everyone else on the network. The following documents contain rules affecting network connections:
Conditions of Issue for IP Addresses
Rules for the use of the CUDN
JANET Acceptable Use Policy
University Acceptable Use Policy - You should make sure that your computer is configured to use DHCP (this setting may be called something like "automatically determine my IP address" or similar).
- Do keep yourself informed. Reported network faults often turn out to be planned downtime for maintenance. Scheduled downtime on University systems are announced on the UIS's News page. Downtime in Chemistry will be advertised by emails and notices.
- Don't forget to keep the departmental database up to date. Your group's IT Representative can keep update the records when machines move or are scrapped.
- Don't swap IP addresses between machines. Never use someone else's IP address or allow someone else to use yours. The same goes for passwords for accounts on shared systems.
- Do pay attention to security. You have a duty to others to keep your machine secure. Hackers will attack any vulnerable machine.
- Do be aware that there is no expectation of privacy on the network. The computer office and the University Network Division can and do monitor network traffic in order to find faults and keep the network running smoothly.
- Do know how to report problems. In the first instance you should contact support@ch.cam.ac.uk giving as much information as possible about the problem. Don't be afraid of stating the obvious; we would rather you gave too much information than too little. If your email is broken then phone us on 36506.
It is strongly recommended that you use the Department’s Managed Workstation service wherever possible, as it provides several benefits. If you use an unmanaged machine (i.e. a machine that doesn’t use this service) in the Department:
- Do secure your machine with a password or PIN and always lock it before leaving it unattended.
- Do set your machine to lock automatically after at most 10 minutes of inactivity.
- Do run up-to-date anti-virus software. University-supplied anti-virus software (Trellix Endpoint Security) can be installed by following this UIS webapge.
- Do install available security updates promptly, by enabling auto updates where possible, and in all cases within 14 days of receiving notification of the update.
- The use of shared accounts is strongly discouraged, however where there is no other reasonable option (e.g. when the machine runs software for managing scientific instruments that can only be set up for use by a single user), you may use them, provided you have a way to prove who was using the machine at any given time. If in doubt, please contact the Computer Officers for advice on how to achieve this.