Why i don't get this IP's Down?

S

SyntexError

//R4P3
Jun 29, 2016
12
7
81
Hello,
does anyone know the reason why the IP's from Unitymedia or else, didn't get any packets received?
I mean, Why i did'nt get any ping response from this IP's 37.201.2.*
[UnityMedia GMBH]

No Packets lost. Just nothing.

Whats the reason? a Proxy maybe i have no idea... and whats the solution to get this IP's down.

PS.: Btw. Its not a only kiddy stupid question.
I only want to understand, whats the reason are for it.
Maybe the reason are protocol types idk. Teach me.)

best regards
syn
 
Awlok

Awlok

Member
Jan 1, 2018
29
5
58
SyntexError said:
Hello,
does anyone know the reason why the IP's from Unitymedia or else, didn't get any packets received?
I mean, Why i did'nt get any ping response from this IP's 37.201.2.*
[UnityMedia GMBH]

No Packets lost. Just nothing.

Whats the reason? a Proxy maybe i have no idea... and whats the solution to get this IP's down.

PS.: Btw. Its not a only kiddy stupid question.
I only want to understand, whats the reason are for it.
Maybe the reason are protocol types idk. Teach me.)

best regards
syn
Click to expand...



try to realize what you are doing and the consequences it can bring to your future .
 
S

SyntexError

//R4P3
Jun 29, 2016
12
7
81
Awlok said:
try to realize what you are doing and the consequences it can bring to your future .
Click to expand...
Yo Dad,
It was a general question.
Why specially this IPs doesn't Ping back.
What's the reason are. Maybe the IP hasn't Public Ports.

I want only a reason for it.

best regards
syn
 
S

SyntexError

//R4P3
Jun 29, 2016
12
7
81
BOLESNI said:
noone will help u about this -.-
fist, is that your server ?
Click to expand...
Hello sir,
i only want to understand why some IP's doesn't Ping back.
Just only that so it's doesn't care if its my own Server.
I can understand when Domain's doesn't Ping Back maybe they have Proxy or other things.
But why doesn't Ping a normal (direct) IP Back with no other ways.
Anyone understand this problem?

best regards
syn
 
Asphyxia

Asphyxia

Owner
Administrator
Apr 25, 2015
1,845
2
2,199
327
Ping typically uses ICMP protocol, read these two resources for more information:

http://www.blog.creativform.com/how-to-perform-tcp-ping-with-ip-address-and-port/
https://serverfault.com/questions/14376/ping-alternative-for-tcp

You can disable ICMP and in most cases, a "ping" will no longer work. Blocking ICMP mitigates many issues like ping sweep, ping flood, ICMP tunneling, forged ICMP redirects. At the same time, realize some important issues may arise by disabling ICMP - such as ICMP black hole, TTL may be affected, and ICMP redirect could be inoperable.

The IETF explains ICMP very well.

SyntexError said:
No Packets lost. Just nothing.
Click to expand...
An awesome website explaining ICMP and whether to block ping is over here http://shouldiblockicmp.com/

A Word About Rate Limiting
While ICMP messages like the ones covered on this page can be very useful, remember that generating all of these messages takes CPU time on your routers, and generates traffic. Do you really expect that you should be getting 1000 pings a second through your firewall in a normal situation? Would that be considered legitimate traffic if you saw it? Nope, probably not. Rate limit all of these ICMP traffic types as you see fit for your network; it's a good line of defence that should not be ignored.
Click to expand...

Read, Research, Understand
Given that the "to block or not to block" discussion for ICMP seems to always result in confusion, anger, and borderline fanatical disagreements, go ahead and read up on the topic yourself. Spend time understanding it as fully as you can; there are plenty of links throughout this page alone. Then you can form your own opinion and make an informed choice about what is best for your network.
Click to expand...
 
S

SyntexError

//R4P3
Jun 29, 2016
12
7
81
Asphyxia said:
Ping typically uses ICMP protocol, read these two resources for more information:

http://www.blog.creativform.com/how-to-perform-tcp-ping-with-ip-address-and-port/
https://serverfault.com/questions/14376/ping-alternative-for-tcp

You can disable ICMP and in most cases, a "ping" will no longer work. Blocking ICMP mitigates many issues like ping sweep, ping flood, ICMP tunneling, forged ICMP redirects. At the same time, realize some important issues may arise by disabling ICMP - such as ICMP black hole, TTL may be affected, and ICMP redirect could be inoperable.

The IETF explains ICMP very well.


An awesome website explaining ICMP and whether to block ping is over here http://shouldiblockicmp.com/
Click to expand...
Really Cool! Thank you so much!<3
 
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