All Questions
17
questions
1
vote
1
answer
126
views
Why am I able to send UDP packet larger than my WIFI interface's MTU?
I have written a simple python program to send a UDP datagram.
import socket
client_socket = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
host_name = socket.gethostname()
host_ip = '1.2.3.4'
print(...
- 191
0
votes
1
answer
1k
views
Wireshark: how to show UDP payload as text?
I have a device that broadcasts strings for debugging purposes, and i need to capture these UDP message and read the string.
As you can see, i cannot read anything in the data.text column, while the ...
- 113
0
votes
0
answers
1k
views
How to fix receiving UDP data on windows?
On a windows 10 machine I am running the following python code (3.10.11) to receive data on UDP port 9001 (without any VM running):
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind((&...
- 452
0
votes
0
answers
133
views
Where could my packets be being blocked?
I am working on a video streaming project, I have issues when sending above a certain amount of traffic (something like 20 Mbs) I no longer receive any packets. Some quick facts:
Windows task manager ...
- 121
1
vote
1
answer
3k
views
wireshark bad udp length > ip payload length
I have a custom made (not by me) imaging device here. It connects to a computer via ethernet cable. The companying application software guides the user in the process of acquiring an image.
So far so ...
- 604
0
votes
1
answer
437
views
No connectivity between hosts on UDP port
Host with IP address 192.168.212.49 is not able to reach host with IP address 10.50.140.179 via UDP 4501 port. ICMP (ping) communication is possible. There are two routers between these hosts.
Note: ...
2
votes
1
answer
3k
views
Can't receive UDP data unless Wireshark is running
We have a computer system (Win10) that receives a variety of UDP data from a remote host at various rates (2-50Hz). The remote system is provided by our customer. While we're waiting for the customer ...
- 269
0
votes
0
answers
156
views
UDP packets sent to wrong IP?
I have an IPTV box connected to my only router that assigned it a local IP 192.168.1.165.
I tapped the LAN cable right next to tv box and recorded traffic in Wireshark. There I saw a remote IP from my ...
- 237
0
votes
2
answers
2k
views
Protocol on Wireshark says LLC
enter image description here
A theoretical question may be.
I have created UDP traffic across my network involving client and Server. When i ping the server and monitor the data using wireshark, it ...
- 1
8
votes
3
answers
8k
views
Wireshark - how can I observe little endian big endian difference in byte order using Wireshark?
I wrote a simple application which communicates using UDP sockets (in C). Application is simple: clients sends numbers to server, and server computes the sum of them.
Now, I know how can I capture ...
- 217
0
votes
1
answer
3k
views
Wireshark highlight missing sequence number
I run Iperf over wifi sending udp packets from a client to a server and I capture the traffic with Wireshark. The total number of datagrams captured in Wireshark is less than sent with Iperf. Based on ...
- 101
3
votes
1
answer
4k
views
Capture only UDP traffic that cannot be identified as another protocol
I have applied the udp filter in order to just capture UDP traffic, as described in Wireshark Wiki:
Show only the UDP based traffic: udp
However, this does not only show UDP traffic. It shows UDP ...
- 6,085
0
votes
1
answer
6k
views
Why filtering on udp port in TCPDUMP gives only fragmented IP frames
I've a device capturing traffic with Tcpdump filtering on "upd dst port" then it creates a pcap file to be read in wireshark.
what I obtain from running:
tcpdump udp dst port 5201 -qUns 0 -i wlan0 -...
- 73
0
votes
1
answer
7k
views
vlc part of desktop streaming to <host>:<port>
With VLC, I wish to stream a portion of the desktop and send it to another host on my local area network.
The capture seems to work, I see a correct portion of the desktop into the VLC server, but ...
- 194
1
vote
1
answer
925
views
IP checksum offload
I recently updated to Windows 8 and get alot of invalid packet transfers. It says "Ip checksum offload?" (Wireshark) and most of my packets get lost. The checksum is 0x00. I also updated my NIC ...
- 11