On Tue, 31 Jan 2006, [iso-8859-15] Benjamí Villoslada wrote: > Interessant! Pots donar detalls? :)
Realment ho Ães d'interessant, us transcric l'anunci de la "prohibició" pq crec que val la pena: ------------------------------ Regarding the use of Skype: A brief description of Skype operation is useful background. Skype is a voice-over-IP service, providing telephone-like service via the Internet. It is also promoted as supporting large file transfers and may offer other bandwidth-intensive services in the future. Optional paid service offerings support calls to/from the public switched telephone network. It uses a piece of client software that attempts to make peer-to-peer telephone calls. If a call cannot be directly established with a peer (e.g. due to firewalls or NAT), the peers will relay their calls through a third-party system. The third-party is another computer with Skype software; the mere installation of Skype is sufficient to launch the relay component, regardless of whether the Skype GUI (client interface) is running. The use of the university network is subject to UC policy, including the Electronic Communications Policy (ECP). The campus network is a university-owned resource in support of the university mission and its associated business. The Skype End-User License Agreement (EULA) includes a contractual grant of network bandwidth; the end user is not authorized to make such an agreement on behalf of the university as owner of the bandwidth. In addition, while the ECP makes an allowance for incidental personal use, the operation of a personal server (e.g. Skype relay) is beyond this incidental allowance. For these reasons, the use of Skype is not permitted on the UCSB campus. There are some secondary issues worth mentioning. One problem we have observed is the abnormal increase in network bandwidth utilization and intrusion detection alerts attributable to Skype installations. The traffic is not due to the individual Skype user, but rather the inherent relay function. Large numbers of inbound connections from foreign countries are typical of compromised systems, but it also occurs with some Skype systems. It should also be noted that Skype will create holes ("exceptions") in the build-in Windows XP firewall. If these exceptions are disabled by the user, they will be re-enabled automatically the next time Skype is started. This may prove to be an excellent vector for a worm. In summary: 1) Skype's End-User License Agreement (EULA) requires the user to grant use of university network bandwidth by Skype users otherwise unaffiliated with the university, and end users are not authorized to enter into this type of agreement on behalf of the university (i.e. the owner of the resource). 2) The operation of Skype's relay function is not in compliance with university policy because (a) it provides service to third-party people other than those conducing university business, and (b) exceeds incidental personal use. 3) Skype persistently alters host firewall settings and increases the probability the computer will be compromised. ---------------------------------------------------------------- Podeu consultar els arxius d'aquesta llista o canviar la vostra subscripció a http://www.softcatala.org/llistes/ ----------------------------------------------------------------