Because UDP doesn't rely on handshaking to guarantee that packets arrive and in order it can be seen as an unreliable protocol, but for real time systems where acting on the data immediately is the most important consideration not having to wait for delayed packets is a distinct advantage. UDP is ...
0
votes
0answers
8 views
receive udp stream and restream in mp4
I have a hardware streamer transmitting H264 over udp.
I need to re transmit for silverlight (in mp4 container).
What free software can i use (preferentially for windows) ?
0
votes
2answers
39 views
Use Nmap to send arbitrary data from spoofed address/port
For testing the error and timeout handling of a custom SIP stack, it is sometimes useful to send UDP packets from multiple source addresses (even ones that are assigned to other hosts) to the host ...
0
votes
2answers
48 views
How can I see the rate at which data is sent?
I have an app that sends messages over UDP in some known format. I'd like to know the rate at which these messages are sent. To be clear, I could care less about the datarate - it's a loopback, so ...
5
votes
1answer
124 views
Does TCP/UDP send file sequentially or randomnly?
Does TCP/UDP protocol always send or receive file packets sequentially? Would it possible to make a choice which data packets will be sent first using sockets API?
0
votes
1answer
69 views
VPN for specific UDP ports?
My ping to DotA 2 servers (online video game) is very poor in afternoon hours. My ping usually go as high as 300ms or even more.
I tried to use OpenVPN with my dedicated server my ping decreased to ...
0
votes
1answer
66 views
What is fjappmgrbulk?
I captured a udp packet from wireshark which ones port is 2510 and destination ip is 81.64.155.202. What is that port for? I found this post) mentioning:
"it's for fjappmgrbulk, fjappmgrbulk ...
1
vote
1answer
61 views
Sending a file via TCP/UDP socket
I'm reading about TCP and UDP from a article. In the end what I understood is that UDP is faster than TCP but it is unreliable. So if I'm going to a send a file, If use UDP, would it
be faster than ...
0
votes
0answers
30 views
How to interpret NutTCP warning: “IP frags or no data reception since buflen > ctlconnmss”
I'm using NutTCP 5.3.1 to test UDP performance on an IPv6 network.
The server is running on another machine.
This is running under Windows with the supplied Cygwin DLL.
The client command is:
...
0
votes
1answer
58 views
How to listen to all ports (udp and tcp) or make them all appear open in Debian
I got an external Debian server. The problem is that my university campus doesn't allow connections to go outside when the port is different than TCP port 22, 80, 443, or UDP port 123. I tested them ...
1
vote
1answer
92 views
Can I browse the web using the UDP protocol?
Is it possible to browse the web if a firewall is blocking the HTTP protocol?
I've read about OpenVPN UDP tunnelling, but is it possible to use the web via the UDP protocol?
0
votes
0answers
31 views
windows xp irregularly refuses to connect to one specific webserver
I think of myself as an advanced user but this problem is driving me batty.
Windows XP (32bit Home) going through a WRT54G router, once or twice a day at completely different random times, refuses to ...
0
votes
2answers
405 views
Netcat/socat behavior with piping and UDP?
I guess this is close to linux - Netcat stops listening for UDP traffic - Super User, but I thought I'd better ask anyways
As far as versions of netcat I'm using Ubuntu 11.04 and the default netcat ...
1
vote
2answers
129 views
Live video streaming over UDP?
What options are currently available for live streaming of video over UDP?
Current solution uses libx264 and wowza media server, to serve up an rtmp stream. Unfortunately it's communicating over ...
0
votes
1answer
197 views
Linux built-in or open source program to join multicast group?
I'm using tcpdump to capture multicast packets and had to code up a custom program to join multicast feeds so tcpdump will "see" the packets. Just wondering if netcat or any other applications can ...
1
vote
1answer
221 views
How do I control the streaming frame rate of ffmpeg?
I am using ffmpeg to stream video:
ffmpeg -i $file -f mpegts udp://hostname:port
On another machine, I am using VLC to play the output stream.
The problem I have is that VLC is playing the stream ...
3
votes
3answers
107 views
How to open a tcp/udp server on linux
I am looking for a simple command line tool to open tcp/udp server/client on a desired port on a linux machine.
2
votes
1answer
131 views
Is there a userspace bandwith limit tool for Linux?
I want to limit the upload bandwidth of a P2P live video program, which is closed source, in Linux.
I don't want to use tc because I don't have root access. There is a tool called trickle, but ...
2
votes
1answer
89 views
Does it matter what UDP port a WOL signal is sent to?
i have seen many WOL instances use port 7 and many use port 9, does it matter?
Isn't it just looking for a WOL packet at layer 2 or ethernet?
3
votes
3answers
610 views
How to use DNS over TCP?
Google DNS (8.8.8.8 and 8.8.4.4) are blocked (or polluted) by all ISPs available to me (and DNS by ISPs just return wrong answers for some sensitive sites!!), and it is said that if we change DNS from ...
0
votes
2answers
664 views
Proxifier that supports UDP?
Im looking for a proxifier that forces all windows traffic through a specific proxy. I have my own server so I can ultimately configure any type of proxy (Socks, HTTPS, etc) so thats not a problem, ...
0
votes
0answers
91 views
UDP network connection not routing properly if 2 external ports are mapped to the same internal port
I have a networking app where I have a device out in the great wide world that is connecting back to a specific machine inside my work network. The router has a static ip address and I'm routing all ...
0
votes
0answers
62 views
Latency concerns on Receiving a multicast on a multicore system
I have 10 processes running on a 2 6core-Xeon-X5680 system. All of them are trying to receive a multicast stream ( UDP socket ) and process the data as fast as possible. I was unclear on how multicast ...
2
votes
2answers
288 views
0
votes
1answer
35 views
Which element of network refused connection
How could I determine, which element of the network actually refused/closed the connection?
2
votes
2answers
148 views
Detect all computers running a service on a network
I'm trying to write a file synchronization protocol presently (consider it a hobby, I know there are plenty of file synchronizers out there) and I wanted to create a way to automatically sync things ...
1
vote
2answers
2k views
Mcafee Host Intrusion Protection blocks all-in-one network printer
I just bought a new HP Officejet 6500 printer. It has a built-in ethernet port, so I happily connected it to my network. While I was playing around with it, I saw that it stopped responding ...
1
vote
3answers
485 views
Force OS X to use SOCKS5
Currently I am using an OpenSSH session (with the -D flag to enable dynamic application level port forwarding) as a SOCKS proxy while I'm accessing the internet through an unencrypted wireless access ...
1
vote
1answer
326 views
Windows 7: how to redirect dhcp traffic to alternative port
I was hoping someone could help me find a way to force DHCP traffic to use an alternative port on Win7. I need windows to send and listen for dhcp traffic on a port other than 67/68.
I have tried to ...
2
votes
1answer
443 views
How to deliberately introduce a delay for incoming UDP packets
I want each packet (that match iptables rule) to be delayed by some fixed time interval. How to to this?
Preudocode: iptables -A INPUT -p udp <more conditions> -j DELAY --delay 50000 # delay ...
1
vote
1answer
849 views
UDP blocked by Windows XP Firewall when sending to local machine
I work for a software development company but the issue doesn't seem to be programming-related.
Here is my setup:
Windows XP Professional with Service Pack 3, all updated
Program that sends UDP ...
2
votes
1answer
389 views
Can I use TCP as DNS query protocol on Mac OS?
I'm using Mac OS, Snow Leopard 10.6.2, and I'm suffering from UDP packet loss during DNS query. So my web browser is too slow to surf internet nicely. But it worked very well when I tried a DNS query ...
1
vote
2answers
2k views
What does this UDP Packet mean?
I'm total newbie at tcp/ip and I was experimenting with Wireshark.
What this mean:
1824 578.194204 xxx.xxx.xxx.xxx yyy.yyy.yyy.yyy UDP Source port: 17500 Destination port: 17500
In data I ...
1
vote
1answer
763 views
How to generate UDP packet
I want to generate UDP packet to test a program,
something equivalent to using telnet to test TCP port (Can telnet generate UDP packet?)
How can I do this?
0
votes
1answer
174 views
How do I establish a connection between 2 computers on different subnetworks?
computer A(192.168.1.134) needs to establish a UDP connection to computer C(192.168.0.30).
As you can see both are on a different subnetwork. Now I have computer B which has 2 IP addresses, one for ...
9
votes
7answers
2k views
Why is it bad to have open ports?
Here's something that has always baffled me. Why is it bad to have open ports on your computer? Assuming you don't have a virus on your computer or some other program listening to a port that may ...
0
votes
3answers
230 views
What typically uses port 44380?
A company just asked me to open port 44380 in my firewall so that their software could work.
This made me wonder... what is the customary use for port 44380?
4
votes
3answers
975 views
Good process specific packet sniffer / viewer?
I am looking for a good, free or not free, packet sniffer.
The main feature I am looking for is an ability to watch a chosen process and view / read all of the data it is sending or receving.
Also I ...
2
votes
1answer
2k views
Netcat stops listening for UDP traffic
I am using netcat on some Linux machines (see this other question), but seeing some unexpected behavior.
Unlike the guide in the accepted answer, I am not using UDP tunneling to do DNS queries. I ...
3
votes
5answers
5k views
UDP traffic through SSH tunnel
The title pretty much sums it up. I would like to send UDP traffic through a SSH tunnel. Specifically, I need to be able to send UDP packets through the tunnel and have the server be able to send ...
