RE: Binding inetd to ip

From: jan.schultheissat_private
Date: Thu Jan 27 2000 - 01:32:53 PST

  • Next message: John White: "Re: Binding inetd to ip"

    Hi
    
    > Is it possible to bind inetd to a specific ip 
    > address/ethernet card under
    > linux?  I haven't been able to find any info myself, but the reason I
    > ask is because I currently am running a nameserver that has 
    > two network cards.
    
    I would suggest you use xinetd instead of inetd. I'm sure there is a RPM 
    available. With xinetd you have more configuration options than with inetd. 
    Specifically, you can limit access to a certain service to a limited range of 
    IP addresses. As far as I recall there is an interface option where you can 
    define on which NIC the services is listening.
    
    > I have (chroot'ed to its own partition) bind 8.2.2-P5 bound 
    > to the second
    > ethernet card and I want nothing else on that card - I want it clean
    > except for port 53, basically.
    > 
    > I bound ssh to the first card and am running xntpd on there 
    > as well (does that have to actually bind to a port?  Is there any way to 
    > stop that?  If
    
    Well if you use your machine as a NTP server then yes it has to bind to a port. 
    Otherwise if you just want to use your machine as a NTP client then probably 
    no. At least under Solaris this is not necessary (ntpdate).
    
    > not is there any way to at least limit it to one card/ip?  Would I be
    > better off just running ntpdate once an hour?) and then I'm running
    > Portsentry on the box to watch for any suspicious activity.
    
    Personally I'd suggest to run ntpdate once an hour. If you don't have a really 
    bad internal clock this should be more than enough.
    
    > ignorant but anyone have any idea what's listening on 1024, 1, 6 ,and
    > 17?  It's a Redhat 6.0 box, if that helps.
    
    look at http://www.isi.edu/in-notes/iana/assignments/port-numbers.
    
    Best regards
    Jan
    



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