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Early this morning, I got a message from PJBS that tomorow(2013/3/9) will be our special english exam, it’ll be a closed-book exam. […]
I was upgrading my IDE from VS 2008 to VS2010 when I located this issue. After google it for a long time, […]
Working on a Loongson(www.loongson.cn) PC, goal is to make it a Meeting Terminal. Because its CPU is MIPS arch, there could be […]
As you may know, to be a robust meeting entity, we must take good care of compatibility requirements for different facilities from different manufacturers. In H.323 protocol, we can use fields like Vendor ID, Product ID, Version ID in the signaling commands. But how to do this when you are using SIP protocol? Definitions in RFC 3261 20.35 Server The Server header field contains information about the software used by the UAS to handle the request. Revealing the specific software version of the server might allow the server to become more vulnerable to attacks against software that is known to contain security holes. Implementers SHOULD make the Server header field a configurable option. Example: Server: HomeServer v2 20.41 User-Agent The User-Agent header field contains information about the UAC originating the request. The semantics of this header field are defined in [H14.43]. Revealing the specific software version of the user agent might allow the user agent to become more vulnerable to attacks against software that is known to contain security holes. Implementers SHOULD make the User-Agent header field a configurable option. […]