Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: 127.0.0.1 vs 0.0.0.0
Special Forums IP Networking 127.0.0.1 vs 0.0.0.0 Post 302952291 by useretail on Monday 17th of August 2015 06:34:51 AM
Old 08-17-2015
Network 127.0.0.1 vs 0.0.0.0
Which one should I use in '/etc/hosts'?
Please explain in details.

Random quotes on the topic:
Quote:
When you use the 0.0.0.0 method it doesnt try connect anywhere. But if you use 127.0.0.1 it actually tries to connect to a service on your computer which makes it take longer and use up more resources. Also you might run a webserver that it ask for invalid requests. Therefore it is better to use 0.0.0.0 than 127.0.0.1 as you want to kill the connection not to loop it back to your computer
Quote:
Why is it better? 0.0.0.0 doesn't connect anywhere. 127.0.0.1 does. If I run a web server that has a virtual host with the same domain name, it would serve the request.
Quote:
What does that have to do with 0.0.0.0? 0.0.0.0 has NO meaning on Linux, FreeBSD, or Mac OS-X and causes problems on those operating systems. The added benefit of using 127.0.0.1 is that the top phttpd (Pseudo HTTP Daemon) and Homer log what is being stopped and why.
Quote:
I have tested both ways in Windows XP and Windows Server 2003 only, and all I can tell so far is that using a template in this form:
127.0.0.1 google-analytics.com
127.0.0.1 ssl.google-analytics.com
is not good at all for my system, and it can slow down even the most common operations.

But I have found that using a template in this form:
0.0.0.0 google-analytics.com
0.0.0.0 ssl.google-analytics.com
seems to be ok as far as system stability is concerned, and even the webpages are loading faster.
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Background processes return 127 sporadically

I have created a shell script that spawns multiple background processes (spawns sqlplus application). I use an array to capture the process id of those background processes. I then loop through the array and issue a 'wait' command to wait on the process id that was captured in the array. I am... (2 Replies)
Discussion started by: max_largo
2 Replies

2. UNIX for Advanced & Expert Users

Serverhost 127.0.0 error message on apache

my apache 2.0 is up and running but after trying to reconfigure it for specifics I ended up with a permanent eror message that I can't seem to get rid of .. when I run the server ( just / */apachect1 start ) the message reads "cannot locate name localhost for server 127.0.0" so far I have tried... (2 Replies)
Discussion started by: moxxx68
2 Replies

3. Shell Programming and Scripting

rc=127 can't fork

I have a script to download a file using wget. It works if I execute it from the command line. But, if I run it in cron, it doesnt work and I am getting the following in the cron log: > CMD: /export/home/username/test > username 23159 c Tue Aug 1 14:40:00 2006 < username 23159 c Tue Aug ... (1 Reply)
Discussion started by: BG_JrAdmin
1 Replies

4. Solaris

Can't setup gateway other than 127.0.0.1?

I have just installed Solaris 10 X86 today, but I can't use internet at all on it. When I was installing it, it only asked me to create a hostname, without even asking me this computer is "networked" or "non-networked". After I finished installation, I use "netstat -rn" command, and only see... (3 Replies)
Discussion started by: Diamondust
3 Replies

5. HP-UX

logrotate: ALERT exitted abnormally with [127]

HP-UX B.11.23 U 9000/800 636114222 unlimited-user license I see this error in my logs sometimes and have very little info on it... I have searched online for some documentation and haven't been able to find much on this issue. The only thing I found on one site is that if my /tmp folder... (4 Replies)
Discussion started by: zixzix01
4 Replies

6. Shell Programming and Scripting

Execution of shell script returns error 127

Hi All, While running shell script i got following output. interpreter "usr/bin/ksh" not found sh: step1.sh: not found. ldnhpux | oracle >echo $? 127 - Running command "which ksh" retruns "usr/bin/ksh". - I found some information on web stating to remove extra carriage return chars,... (8 Replies)
Discussion started by: RuchirP
8 Replies

7. Solaris

sendmail problem, Connection refused by [127.0.0.1]

one of our sparc servers is having this problem: Jun 27 13:05:00 sparki sendmail: p5: from=root, size=309, class=0, nrcpts=1, msgid=<201106271305.p5@sparki>, relay=root@localhost Jun 27 13:05:00 sparki sendmail: p5: to=root, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay,... (3 Replies)
Discussion started by: orange47
3 Replies

8. Solaris

multitude of packets from 127.0.0.1

I was checking routing table, and noticed that our server has a lot packets from localhost: Routing Table: IPv4 Destination Gateway Flags Ref Use Interface -------------------- -------------------- ----- ----- ------ --------- .. 127.0.0.1 127.0.0.1 ... (1 Reply)
Discussion started by: orange47
1 Replies

9. UNIX for Advanced & Expert Users

wait - return code 127

Hi All, I am trying to create background processes and then check their status later. But I am getting return codes as 0,127 randomly On checking the return codes for wait, I found the below. Do I need to treat return code of 127 as successful as well?? as we know the process id passed is... (7 Replies)
Discussion started by: tostay2003
7 Replies

LEARN ABOUT MINIX

hosts

HOSTS(5)							File Formats Manual							  HOSTS(5)

NAME

       hosts - hostname to IP address database

SYNOPSIS

       /etc/hosts

DESCRIPTION

       The  hosts  database  lists the IP addresses and the hostnames that translate to these IP addresses.  It is used by nonamed(8) in a network
       without name servers.  A simple /etc/hosts may look like this:

	      127.0.0.1      localhost
	      192.9.200.1    darask
	      192.9.200.2    burask

       The localhost entry lists a special address that refers to the local host itself (a kind of /dev/tty for hosts.)  You should only  list	it
       if nonamed needs it!  The other entries are actual machines.  The file may contain comments marked with '#'.

       You  can  have  aliases	(more  hostnames on the same line), but it is not recommended, because nonamed can't present them to the system as
       CNAME records.  An often seen form like

	      192.9.200.1    darask.home.cs.vu.nl  darask

       is harmless though, and has the small advantage that you can use the short name in /etc/ethers so rarpd can match it at boot time.

FILES

       /etc/hosts     Hosts database.

SEE ALSO

       ethers(5), nonamed(8), rarpd(8), boot(8).

AUTHOR

       Kees J. Bot (kjb@cs.vu.nl)

																	  HOSTS(5)
All times are GMT -4. The time now is 02:00 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy