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Operating rules for the data network BONNET of the University of Bonn

1. Classification 

The BONNET data network is a central communications infrastructure facility of the University in Bonn. It is used for general data communication and is equivalent to other infrastructure measures, such as electricity supply, water supply or telephone network. It is operated by the University Computer Centre of the University of Bonn (HRZ)


2. Definitions and Connection of Subnets 

a. BONNET allows structuring of the entire network using suitable coupling devices (e.g. multiprotocol routers). Multiprotocol routers can only be dispensed with if the person responsible for the coupling can prove that the network operation is not disturbed, that no appreciable additional load occurs, and that no hardware or software is used that would be suitable for observing, reading or influencing the flow of information in the BONNET data network.  

b. The BONNET data network in the strict sense comprises all transmission facilities (cables, intermediaries, etc.), including transfer points for subnets. Excluded from this are shared transmission facilities under the responsibility of other bodies (e.g. the telephone network). If required, subnetworks can be operated by the HRZ or under the user's own responsibility (see also 4a). BONNET is currently based on the IEEE 802.3 (Ethernet) standard. It has connections to the international Internet, to the national science network X-WIN and to other public networks. 

c. All transfer points may only be set up or modified by or on behalf of the HRZ.

d. Local subnets may only be connected to the networks operated by the HRZ via routers approved for this purpose by the HRZ. At present, the approval is limited exclusively to CISCO routers. 

e. If the mains operations is endangered, unreasonably impeded or disturbed via a transfer point, the HRZ can impose suitable conditions or shut down the connecting sections. 

f. The variety of protocols must be limited to what is absolutely necessary to facilitate communication technically and to keep complexity as low as possible. 

g. IPX/Novell is regarded as a purely local protocol by the DFN- Verein. The routing of this protocol beyond the B-WiN connection is neither allowed directly nor indirectly via IP-tunneling.

h. The existing rules for the use of connected networks (e.g. the broadband science network B-WiN) (e.g. the user regulations of the DFN-Verein) must be followed. If the rules are disregarded, the HRZ can impose appropriate conditions or exclude the access routes from the use of these networks. 


3. Obligations of the HRZ 

a. The HRZ is obliged in its area of responsibility to guarantee the most secure and uninterrupted network operation possible. Planned operational interruptions are announced. 

b. The available and usable network services and protocols will be announced by the HRZ. Additional protocols of a different type are only permitted for limited use in exceptional cases. Any costs incurred are at the expense of the institution requesting the exception. It must ensure that the remaining network operation is not disrupted. 

c. The HRZ accepts no responsibility for impairments transmitted to the connected subnetworks via the data network. 

d. The HRZ assigns the network addresses, is responsible for network management, advises on questions concerning he use of the data network and provides assistance with the configuration of appropriate network hardware and network software. If subnets are operated under the user's own responsibility (see points 1b and 4a), subnet addresses or address ranges are assigned by the computer centre. The further allocation of addresses is the carried out by the person responsible for the subnet. 

e. The HRZ has to ensure that only its specially instructed employees or third parties commissioned by contract are used for error detection, error tracking and network administration. 


4. Obligations of the users 

a. For each subnet connected to the BONNET data network and operated under its own responsibility, a person for the technical support has to be announced to the HRZ. The operation of a subnet includes the preparation of documentation with the information required for network management and error tracking; this includes hardware and network addresses, information on network hardware and network software, as well as the location and contact persons for each connected network component. This documentation shall be made available to the HRZ upon request and in the event of an error. If the hardware and software used in the subnet allows it, the HRZ must be allowed to read data necessary for network management, such as network configurations. Furthermore, the operation of a subnet also includes an agreement with the HRZ about devices and the services offered on them, insofar as university-wide coordination is required, e.g. with the "domain-name-service". 

b. The user has to comply with the data protection laws during the data transfer and to prevent abuse or to complicate the given possibilities accordingly. Listening in, spying out, recording as well as changing foreign data from the data network as well as interfering with communication are prohibited. Measures of error tracking by the HRZ or third parties commissioned by contract are not included. The exchange or modification of network components within a subnet must be discussed wih the person responsible for the subnet and documented by this person. The exchange or modification of network components that affect routing may only take place in consultation with the HRZ. 

c. DV devices which are connected to BONNET and at the same time have a connection to the internal telephone network of the university or to the external public network may only be used in BONNET as routers or gateways if they are operated by the HRZ. 

d. In the case of subnetworks connected to the data network, protection against unauthorised access to stored data is the responsibility of the respective subnetwork operator. The user may only transfer data from the data network to his subnet and the components connected to it that are intended for him. The use of hardware and software that allow misuse is not permitted. 

e. The user is obliged to notify the HRZ of any irregularities, malfunctions or abuse attempts.

f. The data traffic of one user must not unduly interfere with the data traffic of another user. The use of particularly grid-loaded transmissions must be coordinated with the HRZ. 

g. The BONNET data network must not be used to monitor or control the performance of employees. 

h. A violation of this operating regulation shall also be regarded as an abuse in the sense of the HRZ usage regulation, irrespective of further laws (e.g. in analogy to the Telecommunications Act). 


5. Detailed technical regulations

For reasons of data protection and IT security, URLs from the "*" must be switched to servers that are operated within BONNET (IP address range: 131.220.*.*) by central or decentral IT facilities of the University of Bonn. Exceptions (e.g. in joint research projects with other universities) are possible after consultation with the IT security office and the data protection office. 


State 01/2013



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