Thanks.
Actually that is exactly what I intended to do, but it's impossible to
compare "something" to "nothing". As I wrote, the ISP is somehow
blocking certain ICMP replies (not all of them) and I cannot compare if
there is nothing to compare to.
In other words, Wireshark did not capture anythin
On Thu, May 23, 2024 at 3:28 PM Steve Litt
wrote:
> Shlomo Solomon said on Sun, 19 May 2024 21:46:14 +0300
>
> >Thanks.
> >I see your point, but in this case it does not help me for the
> >following reasons:
> >1 - my purpose is to teach how to emmulate traceroute using Python and
> >Scapy, so lo
Yes - I should have mentioned that you can also get a desktop (which I
didn't need, but nice to know it's available).
ALSO - even if you only use the console, you can also access a GUI file
manager in your browser. The instructions on how to activate it were
a bit cryptic, but once I figured it ou
Shlomo Solomon said on Mon, 20 May 2024 09:21:18 +0300
>https://shell.segfault.net/#/login
Very, very nice! Not only a shell, but you can get a desktop system
too. To be sure, it's throttled significantly, but if I ever find
myself without a working Linux system, I can use this resource to get
i
Shlomo Solomon said on Sun, 19 May 2024 21:46:14 +0300
>Thanks.
>I see your point, but in this case it does not help me for the
>following reasons:
>1 - my purpose is to teach how to emmulate traceroute using Python and
>Scapy, so looking at the "real" traceroute code written in C is not
>really
This was not meant to be a debate about software development, so let me
end this thread by:
1 - thanking all
2 - saying that aside from one "small" point, I agree with all Guy wrote
in his last post about security, curriculum, develpment, etc -
especially about "software developers that insist on n
On 5/20/24 09:25, Shlomo Solomon wrote:
On Sun, 19 May 2024 23:17:13 +0300
guy keren wrote:
the fact that traceroute works in this case while your python code
doesn't work in this case, suggests there is some at least one
scenario that your code doesn't handle, even though it could.
Than
On Mon, 20 May 2024 11:24:19 +0300
shimi wrote:
> should have asked: "I don't want to use my ISP, can you recommend a
> shell provider that does not block traceroute?"
>
> -- Shimi
Thanks again.
Good point, except that when I started the thread, that option did not
even occur to me - especial
On Mon, May 20, 2024 at 9:26 AM Shlomo Solomon
wrote:
> Thanks again.
>
> As I wrote earlier in reply to Guy Keren, I know that the Python/Scapy
> code to emulate traceroute does NOT work like the real traceroute, but
> that is the assignment I give to my students based on the curriculum,
> so co
Thanks again.
As I wrote earlier in reply to Guy Keren, I know that the Python/Scapy
code to emulate traceroute does NOT work like the real traceroute, but
that is the assignment I give to my students based on the curriculum,
so comparing this code to the real traceroute does not really help in
th
On Sun, 19 May 2024 23:17:13 +0300
guy keren wrote:
>
> the fact that traceroute works in this case while your python code
> doesn't work in this case, suggests there is some at least one
> scenario that your code doesn't handle, even though it could.
Thank you again.
I agree, but see the rest
Replying to my own post :-)
As I wrote earlier, I do not want to go to the time and expense of
using a cloud server. That would really be over-kill in this case. But I
discovered a great free service that offers a Linux bash prompt in the
cloud with no need to setup anything. For anyone who is int
On Sun, May 19, 2024 at 5:43 PM Shlomo Solomon
wrote:
> I teach computer networking and the latest assignment I gave my
> students was to use Python and Scapy to emmulate traceroute. The code
> is simple:
> - send an ICMP packet with TTL = 1 which will fail but return the
> first hop address
>
the fact that traceroute works in this case while your python code
doesn't work in this case, suggests there is some at least one scenario
that your code doesn't handle, even though it could.
your refusal to look at the code of traceroute, and instead insisting of
"blaming the middle-man" a
Thanks.
I see your point, but in this case it does not help me for the
following reasons:
1 - my purpose is to teach how to emmulate traceroute using Python and
Scapy, so looking at the "real" traceroute code written in C is not
really relevant.
2 - The fact that Python code that worked until rece
On 5/19/24 17:42, Shlomo Solomon wrote:
I teach computer networking and the latest assignment I gave my
students was to use Python and Scapy to emmulate traceroute. The code
is simple:
- send an ICMP packet with TTL = 1 which will fail but return the
first hop address
- continue sending ICMP
That is certainly a possibility, but since the packets and the replies
are between me and various routers on the way to the destination (and
not directed at 019), I don't see the point.
As I mentioned, only the final reply (from the destination) does not
arrive - error replies from all the router o
019 might have disabled it for the same reason (security/DDOS)
אורי
u...@speedy.net
On Sun, May 19, 2024 at 6:08 PM Shlomo Solomon
wrote:
> Thanks.
>
> 1 - I will send it dirr=ectly to you - not to the list.
>
> 2 - No - that is not the problem since it works when I connect via a
> hotspot (i.e
Thanks.
1 - I will send it dirr=ectly to you - not to the list.
2 - No - that is not the problem since it works when I connect via a
hotspot (i.e. a different ISP).
When I use my "regular" 019 connection, I get:
sudo python tmp1.py www.google.com
1 10.0.0.138 0.047
2 10.64.0.250 0.038
3 10.64.0.
Thanks.
Forgot to mention that I DID try the code at school and it works - high
school - not university :-)
I don't want to go to the time and expense of using a cloud server. I
want this to work at home as it has worked for many years :-)
On Sun, 19 May 2024 17:49:06 +0300
Shay Gover wrote:
Hi Shlomo,
1. Send me the code and I will try to test it.
2. Are you sure there is a reply when your message reaches the destination?
And does it depend on the destination? Some destinations may disable it for
security reasons (DDOS attacks).
Uri.
אורי
u...@speedy.net
On Sun, May 19, 2024 at 5:
Maybe use a vm on some random cloud service?
Or better yet, use a university computer.
On Sun, May 19, 2024 at 5:43 PM Shlomo Solomon
wrote:
> I teach computer networking and the latest assignment I gave my
> students was to use Python and Scapy to emmulate traceroute. The code
> is simple:
> -
I teach computer networking and the latest assignment I gave my
students was to use Python and Scapy to emmulate traceroute. The code
is simple:
- send an ICMP packet with TTL = 1 which will fail but return the
first hop address
- continue sending ICMP packets - each time increasing the TTL to ge
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