Plenty of ZEROs 0000000000000, normal?

brendanrtg

Well-Known Member
Oct 4, 2006
311
0
166
We did a netstat -na and see tons of zeros as follows:

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN
tcp 0 0 66.90.77.53:53 0.0.0.0:* LISTEN
tcp 0 0 66.90.77.52:53 0.0.0.0:* LISTEN
tcp 0 0 66.90.77.51:53 0.0.0.0:* LISTEN
tcp 0 0 66.90.77.50:53 0.0.0.0:* LISTEN
tcp 0 0 66.90.78.94:53 0.0.0.0:* LISTEN
tcp 0 0 66.90.78.93:53 0.0.0.0:* LISTEN
tcp 0 0 66.90.78.92:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.62:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.61:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.60:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.59:53 0.0.0.0:* LISTEN
tcp 0 0 66.90.78.91:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.58:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.57:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.56:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.55:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.54:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.53:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.52:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.51:53 0.0.0.0:* LISTEN
tcp 0 0 208.53.143.50:53 0.0.0.0:* LISTEN


Is this normal?
 

chirpy

Well-Known Member
Verifed Vendor
Jun 15, 2002
13,453
31
473
Go on, have a guess
strictly speaking 0.0.0.0 is the wildcard address (i.e. listening on all IP addresses), as opposed to localhost which is usually 127.0.01 :)
 

brendanrtg

Well-Known Member
Oct 4, 2006
311
0
166
This wildcard address is not sounding good at all.

Can we setup

the system to listen only on localhost?
 

chirpy

Well-Known Member
Verifed Vendor
Jun 15, 2002
13,453
31
473
Go on, have a guess
If you don't want to listen on each IP address for named, then shut it down. If you only want to use it for local lookups, deny access to it in iptables. Same goes for FTP, if that's what you really want to do - seems an odd thing to do.
 

brendanrtg

Well-Known Member
Oct 4, 2006
311
0
166
You are right, we dont really want to do that. Its was a silly question. :eek:
 
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