Routing problem

B

balanga

Can anyone explain what is happening here:-


Code: 
PING 1.1.1.1 (1.1.1.1): 56 data bytes

92 bytes from 192.168.194.75: Destination Net Unreachable
Vr HL TOS  Len   ID Flg  off TTL Pro  cks             Src     Dst
 4  5  00 0054 2e17   0 0000  40  01 c75a 192.168.194.141 1.1.1.1

92 bytes from 192.168.194.75: Destination Net Unreachable
Vr HL TOS  Len   ID Flg  off TTL Pro  cks             Src     Dst
 4  5  00 0054 19e8   0 0000  40  01 db89 192.168.194.141 1.1.1.1
 
1 means "all", so you wanna ping "all"."all"."all"."all" which can also be seen as you try to ping all IPv4 addresses on the whole internet at once.

Edit: Wrong answer.
 
That's what I understood what you're trying to do.
I always use the IP address of our router to see if have access to the LAN at all, then one of the IP addresses of the provider's DNS to see if have connection to the internet, or another IP of a certain machine I know.
I'm always very careful with such "special numbers", since there are some with special meaning. And if you are not fully aware of what they mean there are traps (see my first post).
 
JFI I access the Internet via a USB tethered phone. I have a spare phone which is broken for normal use but until yesterday tethering worked normally and has been doing so for months.

I have now connected my normal phone and have Internet access again, although the connection is via a different IP address. Maybe this is because my normal phone is 5G and the old one is 4G.

I was wondering if the problem could have been due to overuse and overheating. When USB tethering is enabled, an IP is assigned as usual but traffic seems to get messed up.
 
balanga said:
I always used to ping 8.8.8.8 but now use 1.1.1.1 to check if I have Internet access.
Click to expand...
8.8.8.8 is google public dns so usually a good addr to ping. The icmp message about dest. net not reachable is likely from some downstream router node.
 
As far as I understood what I just learned is the question why 1.1.1.1 is unreachable may have two causes:
  • 1.1.1.1 is blocked by your provider
  • your phone doesn't work anymore
If you can reach 1.1.1.1 with the other way of connecting, then of course it can't be the first point.
With the second it could be the same reason my wife's iPhone stopped working two weeks ago:
The 3G net was switched off, and since the phone is capable to use 4G and 5G within its config it was set to 3G.
Since I don't know about the situation if in your country 3G was also switched off, but it could be worth a try you may check the phone's config options to tell it not to use 3G.
 
balanga said:
Can anyone explain what is happening here:-


Code: 
PING 1.1.1.1 (1.1.1.1): 56 data bytes

92 bytes from 192.168.194.75: Destination Net Unreachable
Vr HL TOS  Len   ID Flg  off TTL Pro  cks             Src     Dst
 4  5  00 0054 2e17   0 0000  40  01 c75a 192.168.194.141 1.1.1.1

92 bytes from 192.168.194.75: Destination Net Unreachable
Vr HL TOS  Len   ID Flg  off TTL Pro  cks             Src     Dst
 4  5  00 0054 19e8   0 0000  40  01 db89 192.168.194.141 1.1.1.1
Click to expand...
Can anyone explain what is happening when I get a response like that above?

I just got something similar after tethering via USB. I don't normally, but wondered what the cause was.
 
192.168.194.75 doesn't have routing information for destination 1.1.1.1
Do you have control over 192.168.194.75 to check it's routing table?
 
VladiBG said:
192.168.194.75 doesn't have routing information for destination 1.1.1.1
Do you have control over 192.168.194.75 to check it's routing table?
Click to expand...
That is the IP address provided when I run dhclient ue0 after I enable USB tethering on my phone.
 
Should I simply assume that this is a routing problem with my provider and has nothing to do with anything in my own setup?
 
Sorry my mistake the message said that 192.168.194.141 doesn't know how to reach 1.1.1.1. It may missing that route in it's FIB or it's filtered on purpose using firewall.
 
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