!27.0.0.1 vs. 0.0.0.0
I can use any number of tools to see what ports I have listening and/or connected. But among the *Listening* ports, some are 127.0.0.1 and some are 0.0.0.0. What is the difference between 127.0.0.1 and 0.0.0.0 ? Since I've got both - there MUST be a difference. Thanks, Alan
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Alan
8/11/2001 9:59:00 PM
grc.security
16608 articles. 
3 followers.
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0.0.0.0 stands for all interfaces (example: yourIPaddress,127.0.0.1-127.254.254.254) 127.0.0.1 stands for local interface only (127.0.0.1)
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b
8/11/2001 10:22:00 PM
> 0.0.0.0 stands for all interfaces > (example: yourIPaddress,127.0.0.1-127.254.254.254) > > 127.0.0.1 stands for local interface only (127.0.0.1) I don't get it. I guess I'm slow today. Could you paraphrase the part: "0.0.0.0 stands for all interfaces (example: yourIPaddress,127.0.0.1-127.254.254.254)" I just don't get that at all. Alan
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Alan
8/12/2001 12:46:00 AM
> 0.0.0.0 stands for all interfaces > (example: yourIPaddress,127.0.0.1-127.254.254.254) > > 127.0.0.1 stands for local interface only (127.0.0.1) I don't get it. I guess I'm slow today. Could you paraphrase the part: "0.0.0.0 stands for all interfaces (example: yourIPaddress,127.0.0.1-127.254.254.254)" I just don't get that at all. Alan
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Alan
8/12/2001 12:46:00 AM
sorry took a ride.. yes lets say your internet address is 217.254.255.1 (its obviously not) then lets say the listening address is 0.0.0.0, what this implies is that if someone connects to your internet address(217.254.255.1), the port will be open on (217.254.255.1 as well as 127.0.0.1) and accept there connection. where if the listening address was 127.0.0.1, if someone connected to (217.254.255.1) , the port would not be open, and the connection would be refused now the 127.0.0.1-127.255.255.254 i was just reffering to the local ip addresses, you can ping any ip address from 127.0.0.1 to 127.255.255.254, and your computer will reply (its all localhost)
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b
8/12/2001 2:15:00 AM
> Hi, > > Just to butt in for a moment, (scuse) ... a service listening on 0.0.0.0 > is open for connection requests from all incoming ips on any port, but > 127.0.0.1 is for local only ... would that be correct ? read my first posted reply to this?
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b
8/12/2001 2:56:00 AM
"b" <bobbie@prodigy.com> wrote in message news:9l4orn$f0t$1@news.grc.com...\ > yes lets say your internet address is 217.254.255.1 (its obviously not) > then lets say the listening address is 0.0.0.0, what this implies is that if > someone connects to your internet address(217.254.255.1), the port will be > open on (217.254.255.1 as well as 127.0.0.1) and accept there connection. > where if the listening address was 127.0.0.1, if someone connected to > (217.254.255.1) , the port would not be open, and the connection would be > refused Hi, Just to butt in for a moment, (scuse) ... a service listening on 0.0.0.0 is open for connection requests from all incoming ips on any port, but 127.0.0.1 is for local only ... would that be correct ? --Bones drmccoy@san.rr.com <no advice given to Vulcans>
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Bones
8/12/2001 2:59:00 AM
> yes lets say your internet address is 217.254.255.1 (its obviously not) > then lets say the listening address is 0.0.0.0, what this implies is that if > someone connects to your internet address(217.254.255.1), the port will be > open on (217.254.255.1 as well as 127.0.0.1) and accept there connection. > > where if the listening address was 127.0.0.1, if someone connected to > (217.254.255.1) , the port would not be open, and the connection would be > refused Ok, b, that's perfect. I understand now. Thanks, Alan
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Alan
8/12/2001 3:15:00 AM
b wrote:
> read my first posted reply to this?
Yes. Thank you.
--Bones
drmccoy@san.rr.com
<no advice given to Vulcans>
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Bones
8/12/2001 4:38:00 AM
127.0.0.1 means listening for other local processes to connect. 0.0.0.0 means listening for traffic from the IP external interfaces. -- Kent W. England "Alan Guy" <nospam@myhouse.com> wrote in message news:MPG.15df74bb1f98972d98969c@news.grc.com... > I can use any number of tools to see what ports I have > listening and/or connected. > > But among the *Listening* ports, some are 127.0.0.1 and some > are 0.0.0.0. > > What is the difference between 127.0.0.1 and 0.0.0.0 ?
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Kent
8/12/2001 8:17:00 PM
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