Behavior and Culture
Sol-box’s mail server contained such device called Flash-RAM,which has a mini Linux kernel.The Flash RAM is inserted in IDE slot,and always is smaller as being compared with harddisk.Once the kernel in the IDE-ROM startups, it will detect all the modules and initiate the drivers of devices.The data is stored in the harddisk,and the kernel tell the computer to operate with specific devices,such as harddisk.When harddisk halted,it will give the following message:kernal panic and then we should change another harddisk.So the kernel is the soul which is the most important.Kevin said there are about 70 engineers in RD(research and develop) team.They used the kernel of 2.4.30 to product a Linux system named Bax.The Bax includes drivers of ethernet card and Raid controllers.Almost these drivers are based in Intel platform,but do not contain every devices pubulished by Intel.For example,Marvell gigabyte ethernet card.
In many cases,the FAE would be asked to diagnose in console mode.Telnet command is commonly used.First,we should called the customer’s system administrator(In Taiwan,called MI meaning Manager Information),to open port 22 which is for SSH.Perhaps MI has never known about how to configure the firewall to do this or MI is worried about the whole system’s security,they would not open the port.How to check the port 22 has been opened? In the command line statue,issue the following commands:
#ping 192.168.1.26 22
If ssh messages display after pressing Enter,it means the port has been opened successfully,then engineers could connect to the server remotely by telnet.
When the mail is refused by the mail-server, there will be a responsed mail sent to the user.Just image,the reminding mail is sent as soon as the server find rubbish mail,how many remind mails will be in your mail-box?It even becomes another type rubbish mail.So we should configure the mail-server to hold these mails and sent them together to user in specific clock.
The error message of sending email must be in English language for convenience.In the email’s detail mode,text following by title “subject” should be coded for protecting user’s privacy.However,about 70% mail-servers are not in this way.The text in the email’s header contained more than 1500 words is also considered as rubbish letter because ofbehavior which is not common.DoS,and Dictionary attacking usually happen.We can take corresponding strategy to prevent them.For example,MI could filter the IP which tried to send mail by using dictionary if the connect counts are more than three times.
Behavior and culture.Although culture is very differnt, it’s not realistic by using either Black-up strategy or Content Filter.The only way,or the beat measure to prevent rubbish mail is using Behavior judgment.A mail is judged as rubbish or not does not rely on its contents, the behavior of sender Mail-server is our concern.