The udp tag has no wiki summary.
2
votes
0answers
35 views
TPROXY for redirecting UDP on arbitrary ports
I want to intercept all UDP traffic leaving tap1. And possibly reply to e.g. DNS-requests. To accomplish this I wrote some python code listening to localhost and use iptables with a rule-set like ...
3
votes
0answers
36 views
What are the requierements to sniff UDP packets in a Wireless Ad-Hoc network?
In a wireless Ad-Hoc network,
I have two computers which communicates in UDP together from 192.168.1.3 to 192.168.1.5
I have a third computer (192.168.1.6) which wants to listen to the packets which ...
1
vote
1answer
70 views
why ss(8) understands listening UDP ports differently than netstat(8)?
If I execute ss -lu in order to view all the listening UDP sockets, then none of the sockets are displayed. If I execute ss -au, which lists all(both listening and non-listening) UDP sockets, then ...
1
vote
0answers
105 views
Centos 6.3 Server ignoring IGMP Queries
I am using a centos 6.3 server to subscribe to UDP multicast data and I noticed that my server doesn't answer to the IGMP queries sent by the switch it is connected to.
As a result, when I open my ...
0
votes
0answers
151 views
Tools to find OpenVPN UDP packet corruption
Are there Unix tools to troubleshoot UDP packet corruption? I'd like to avoid writing my own...
I think ping might report when a packet is corrupted, but it doesn't really seem to have options ...
4
votes
1answer
90 views
Alternative to DNS for internal servers
I am setting up my first network at work. All the servers are running CentOS 6.3 and have statically assigned IP addresses.
For example:
server1 192.168.0.101
server2 192.168.0.102
I want to be ...
1
vote
0answers
67 views
Cannot see an EC2 VPN server from another EC2 instance
I'm using openVPN to connect to one EC2 instance from another. The client cannot see the server, however, despite that servers outside of AWS can see the server and successfully negotiate with it.
...
1
vote
2answers
126 views
How to find transmission speed?
Two host machine's one as a client and other as a server, i am testing udp load-test in these two machines.Machine Ethernet speed is 100 Mbps but i want to send 30000 packets each of 512 bytes at 1 ...
0
votes
0answers
93 views
UDP packet loss when cache is enabled [closed]
I am getting UDP packet loss when we enable the cacheon a MCF5485 Cold Fire processor.
In the Access Control Registers (bits 5-6,CM) i.e:
00 Cache able,write-through
01 Cache able,copy back
10 ...
2
votes
1answer
364 views
I can SSH and HTTP, but not ping or access particular UDP services over my LAN
So I've encountered a weird problem when trying to set up a Linux server running a variant of CRUX Linux. I am trying to configure it to be a Teamspeak server, but no clients can connect. The ...
2
votes
0answers
308 views
Linux bridge blocks UDP packet from tap interfaces
Introduction: I'm working on a 6lowPAN projects of Wireless Sensor Networks. Basically, I have a set of nodes (Contiki OS) which are running on a linux host. Each nodes have its own tap interface ...
1
vote
1answer
468 views
Scan one or all ports, on UDP or all protocols, to see if I'm getting, what I suppose to get
I have a GPS localizer (TK102). I've set it up to send responses over GPRS to particular IP and over particular port. I was told that, it uses UDP.
It seems that something is being sent (paid ...
2
votes
1answer
793 views
Run nmap via Tor
Is it possible to runnmap via Tor?
When I googled around, I got the impression that Tor uses Polipo / Privoxy, which are socks5 proxies. So any TCP / UDP aware applications should be able to use them ...
3
votes
1answer
338 views
Why isn't my application receiving broadcast packets?
I have written a Qt application that listens for UDP broadcast packets on the network interface p2p1. I have installed the application in Fedora 17 i386 in a VirtualBox VM. For some reason, the ...
3
votes
1answer
1k views
Why would my Linux host suddently stop receiving multicast? All other nics on private network are receiving
Here is my dilemma. Suddenly, as of yesterday, multicast packets are no longer being received from eth1 (private gigabit network) from one node. Routing between all the nodes is fine, no collisions, ...
2
votes
1answer
286 views
ICMP destination unreachable
I am working on an Arch Linux machine with an ethernet interface eth1. I have created the interface eth1:0 using ifconfig and given it a dummy hardware address (00:01:02:03:04:05). When I send a UDP ...
1
vote
2answers
285 views
UDP NAT Punching
I have the following two problems. Please help me to solve them:
In symmetric NAT, as I know, the local hidden node (behind the NAT) must initiate connection in order to create a window in the NAT ...
3
votes
2answers
394 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 ...
0
votes
1answer
197 views
recvfrom() doesn't get any request from any remote client
I have written a udp server which receives client requests using a recvfrom() socket system call, this call receives requests from localhost only, no remote host requests are seen by the recvfrom() ...
2
votes
2answers
238 views
UDP multicasting broken after kernel update
I've got an embedded system which is running a stripped down Gentoo userland with a manually build kernel. The system acquires data from a PCI card and sends it out to an UDP multicast group.
All ...
3
votes
2answers
4k views
How do I reserve ports for my application?
How do I reserve a list of ports for my custom applications?
To be specific, the product I'm creating has a lot of processes and a lot of intercommunication between them.
The problem I'm having is ...
