dxuranus
2006-Jul-26 02:00 UTC
[CentOS] how to let other people know my hostname through IP address
i have a public hostname "a" (not my machine name)on internet and my ip is xx.xx.xx.xx; the problem is other people can get my ip through hostname.but if he try to get my hostname through ip he always failed. the case above is in my program (i make it) ,what can i do for this?
Matthew Miller
2006-Jul-26 02:26 UTC
[CentOS] how to let other people know my hostname through IP address
On Wed, Jul 26, 2006 at 10:00:19AM +0800, dxuranus wrote:> i have a public hostname "a" (not my machine name)on internet and my > ip is xx.xx.xx.xx; > the problem is other people can get my ip through hostname.but if he > try to get my hostname through ip he always failed. > the case above is in my program (i make it) ,what can i do for this?This is not a CentOS issue. You need your ISP to set your "reverse DNS". Depending on your ISP, they may not do this for customers at all. -- Matthew Miller mattdm at mattdm.org <http://mattdm.org/> Boston University Linux ------> <http://linux.bu.edu/>
Rafael Azenha Aquini
2006-Jul-26 02:33 UTC
[CentOS] how to let other people know my hostname through IP address
Em Qua, 2006-07-26 ?s 10:00 +0800, dxuranus escreveu:> i have a public hostname "a" (not my machine name)on internet and my > ip is xx.xx.xx.xx; > the problem is other people can get my ip through hostname.but if he > try to get my hostname through ip he always failed. > the case above is in my program (i make it) ,what can i do for this?Do you have a zone reversa configured of the DNS? Perhaps lacks this to you. if I said nastiness, please: delete this mail and forgets? []'s
dxuranus
2006-Jul-27 01:00 UTC
[CentOS] how to let other people know my hostname through IP address
> > i have a public hostname "a" (not my machine name)on internet and > my > > ip is xx.xx.xx.xx; > > the problem is other people can get my ip through hostname.but if > he > > try to get my hostname through ip he always failed. > > the case above is in my program (i make it) ,what can i do for > this? > > This is not a CentOS issue. You need your ISP to set your "reverse > DNS". > Depending on your ISP, they may not do this for customers at all. > >did you know qmail ,he can achieve this by local software.i guess the process of dns reserve is like this:the remote pc first try to get information from you if failed he try with your ISP.is this right? but i do't know what kind of protocal it ues when remote pc contact you,and i think i just need fellow the protocal make some code and then i can do what qmail can! thanks for any help!