The broadcast tag has no wiki summary.
2
votes
3answers
271 views
How is DHCP request message broadcasted?
The broadcast address of DHCP request message is 255.255.255.255. Will this request message go through routers? It seems to be yes as the destination address is 255.255.255.255. However, it does not ...
1
vote
3answers
100 views
iptables: match only untagged traffic on an interface with VLANs
As far as i know, there is no way of distinguishing VLAN traffic in iptables on the master interface (that is the interface to which virtual VLAN interfaces are added with vconfig or ip link add link; ...
4
votes
1answer
101 views
How does broadcasting work on a server with multiple IPs?
Say you have two dhcp servers, A and B.
Server A has two IP addresses, 10.0.0.1 and 10.0.0.2.
Server B has one IP address, 10.0.0.3.
Server A has two instances of isc-dhcp running, one specifying a ...
1
vote
1answer
96 views
Setting ip helper-address to a broadcast address, bad idea?
Info:
A number of vlans running on a 16 bit subnet
All DHCP servers are on the same subnet (10.1.0.0/16)
All switches and routers are Cisco
If I was to set the ip helper-address in our ...
0
votes
0answers
33 views
IP Helper Policies
So I'm fairly new in the higher-end Firewall market - but recently have purchased a Sonicwall (2nd hand for lab) for lab purposes.
I have a LAN interface configured on 192.168.0.1 and a Wireless AP ...
2
votes
2answers
144 views
VmwareESXi Vlans, Cisco devices and broadcast making the things odd
I'm having problem for some days trying to make a correct configuration
Right now I have a Cisco Catalyst switch, a Cisco Router 2811 and a VMware ESXi node with 4-8 VM (Linux,BSD, Windows), each ...
0
votes
0answers
33 views
Lookup Cisco VPN client computer
Our client is running Cisco SSL VPN accessed by AnyConnect clients.
Now we have one particular remote computer that is special in such that it connects and consumes services on the network as a ...
-2
votes
1answer
66 views
How to find which system is broadcasting in network [closed]
I have netgear N150 wireless router model WGR614. I am receiving Google search captcha confirmation for some searches.With message that Google is receiving a lot of requests from our network.
How I ...
-5
votes
2answers
97 views
half-duplex and full-duplex Ethernet vs Switches and Hubs [closed]
From a youtube video I came to know of the following things
All machines connected to a HUB are a part of a single collision domain.
All machines connected to a SWITCH are a part of a single ...
0
votes
2answers
145 views
Broadcast traffic on large vlan in numbers [closed]
I'm looking for the magic number of how many clients make sense to have on a single VLAN, before the broadcast traffic becomes a real issue.
Preferably, I'd also like to know what a good number of ...
1
vote
1answer
177 views
Network discovery across VPN and local subnets
This question is about interaction between VPN clients and local machines.
I have a simple network on the subnet 10.0.200.0/24. The router supports VPN. The router forces the VPN IP pool to be on a ...
0
votes
2answers
228 views
How to forward a TCP/UDP broadcast to another VLAN on a Cisco switch?
I have client software which sends out a broadcast on some TCP and UDP port numbers. The broadcast it sends out is designed to look for the server. But the server is sitting on another VLAN so the ...
1
vote
1answer
102 views
Is it makes sense to manually set broadcast address for interfaces?
I'm converting my scripts from old net-tools:
ifconfig eth0 192.168.2.1 netmask 255.255.255.0
to iproute2:
ip link set eth0 up
ip addr add 192.168.2.1/24 dev eth0
and I notice new commands ...
1
vote
2answers
163 views
DHCP and the use of link-layer broadcast
I have some doubts I can't clarify in the manual (Kurose or Tanenbaum)
DHCP use a link-layer broadcast. If we are using DHCP and to receive a response, the node should be in the same link as the DHCP ...
2
votes
1answer
95 views
When should NTPd broadcast/broadcastclient be used instead of client/server or peer modes?
The NTP deamon if often used in its simplest mode, which is client/server: you specify one or more server directives in your ntp.conf and your clients will use those servers.
In addition to that, ...
1
vote
0answers
138 views
Forwarding broadcast traffic [closed]
I have a host that receives broadcast queries on a UDP port.
I would like to forward this broadcast traffic to another host from another network.
Is it possible to port forwarding broadcast traffic ...
0
votes
1answer
157 views
arp across subnets which devices can be detected?
i have some devices connected in the same physical network (LAN) but in different subnets. I want to detect them all with the ARP from my computer. My Computer is also in the same physical network but ...
0
votes
2answers
627 views
VLAN support on Juniper EX - 2200 switches
I have 6 Juniper switches (EX - 2200) connected to each other as shown in the network topology.
![enter image description here][1]
I have two PC's that I am using
PC1 - (used for configuring the 6 ...
1
vote
1answer
113 views
Solaris spoof mac impossible
I need to spoof the MAC address in Solaris 10, running in a ESXi VM. The MAC I need is outside the range permitted by vSphere.
So I add an "ether" entry to /etc/hostname.e1000g0 so the file says
...
0
votes
1answer
194 views
Broadcasts from guest machine not reached host machine
I have an application that sends UDP broadcasts to some port, for example 11000 (BROADCAST_APP) and another application that listens the 11000 UDP port(LISTENER_APP). The apps works well on the ...
1
vote
4answers
94 views
Just one client bound to address and port: does it make a difference broadcast versus unicast in terms of overhead?
Scenario:
I am implementing failed over for a network node, so my idea is to make the master node listens on a broadcast ip address and port. If the master node fails, another failover node will ...
2
votes
2answers
655 views
Can I test broadcast packets on a single machine?
I want to have a server sending broadcast UDP packets and two other clients, in the same machine, receiving them. Can I do that somehow? What IP address would I use?
@gravyface gave me hope but I ...
0
votes
0answers
63 views
Support for multicast/broadcast on hosting providers [closed]
Are there any good hosting providers that support servers with multicasting/broadcast? I know EC2 doesn't
I am writing the back-end of an application and would ideally go with with UDP ...
0
votes
1answer
377 views
Broadcast between VLANs
I have a network with 2 VLANs running on a Cisco SGE2010 with the switch acting as the gateway for each vlan:
192.168.10.0/24 VLAN 10
192.168.20.0/24 VLAN 20
Servers live on VLAN 10 and Desktops on ...
1
vote
1answer
469 views
Many clients on a wireless AP for UDP broadcast packets
I asked this question on StackOverflow and was directed over here, so I'd appreciate any advice.
I'm deploying a smartphone application as part of a live music performance that depends on receiving ...
-3
votes
1answer
121 views
streaming hd video over internet [closed]
I will like to stream live hd video 24/7 But I don´t like to pay for a video stream server like http://www.viastreaming.com
What is the hardware and software you recommend for a 500 simultaneous ...
7
votes
1answer
372 views
Can a limited broadcast packet contain destination MAC address other than FF:FF:FF:FF:FF:FF?
Can a limited broadcast contain destination MAC address other than FF:FF:FF:FF:FF:FF?
If the answer is true, could you provide an example of a protocol that uses a packet like this.
Ok, to elaborate ...
1
vote
0answers
97 views
Is there a way to use Sharepoint 2010 Central Admin to send an email to all connected users to alert about a System Restart?
We have Sharepoint 2010 Server running in a test mode on one of the servers in our intranet (LAN) and I would like to broadcast an email to all connected users if any are currently using Sharepoint.
...
1
vote
2answers
271 views
How to configure samba to workaround UDP broadcast problems?
I have a problem that NetBIOS name of my Ubuntu laptop connected through WiFi cannot be resolved from other machines. Using a packet sniffer and nmblookup I figured out that the wlan interface doesn't ...
0
votes
1answer
326 views
255.255.255.255 broadcast address meaning
Lets suppose we have a computer with three NICs:
NIC_1: 172.16.1.1/24
NIC_2: 192.168.1.1/24
NIC_3: 103.55.34.32/24
We send a packet with the destination IP address being 255.255.255.255.
1) if ...
1
vote
0answers
138 views
psad, alarm for host scanning broadcast address
I've set up psad 2.1.5-3 in Ubuntu 10.10. I keep receiving emails like this
=-=-=-=-=-=-=-=-=-=-=-= Wed Oct 19 17:26:57 2011 =-=-=-=-=-=-=-=-=-=-=-=
Danger level: [4] (out of 5)
Scanned ...
5
votes
1answer
249 views
Network bridge and broadcast ethernet frames
Let R1 and R2 be two (wireless) routers. Both R1 and R2 have one wired interface eth0 and one wireless interface wlan0. On each router, both interfaces are bridged on br0. So:
R1.br0 = R1.eth0 + ...
0
votes
1answer
224 views
How to configure a network router to forward (rebroadcast) wcf discovery
I can't perform wcf discovery through a network router.
I have a client and server app. When deploying these two apps to any two computers on the same lan it works perfectly. The client app finds ...
-1
votes
1answer
106 views
Live Stream to iPhone [closed]
I have a simple setup:
Server with Intel Duel Core Xeon with 8 GB of RAM
Fitted with a Ospray 440 hardware.
Have a software for capturing, encoding and streaming live TV. (probably VLC Player or ...
1
vote
1answer
336 views
Using SLP (service location protocol) in an environment without multicast (OpenSLP)
Is it possible to use SLP (service location protocol) in an environment which does not support multicasts but just broadcasts? From what I've read it should be possible, but I can't get it to work.
...
1
vote
1answer
445 views
Limiting broadcast traffic illogically. What are the downsides?
We've been thinking through re-arranging the end-user network and VLAN configuration. We're currently doing things in a way that isn't quite typical, but given that it is working, we're hesitant to ...
2
votes
1answer
727 views
Forward broadcast to fixed IP using IPTables
I need to forward (route) broadcast packets from several wireless clients to a single server in the fixed network. The wireless and fixed network are not bridged for security reasons.
With the ...
0
votes
1answer
861 views
Broadcast storm [duplicate]
Possible Duplicate:
How managed switches handle Broadcast Multicast and Unicast?
An application published broadcast message to a network, and caused network switch to drop packet. I have ...
5
votes
2answers
2k views
How managed switches handle Broadcast Multicast and Unicast?
Under typical scenarios, a network switch needs to handle broadcast, multicast and unicast messages at the same time.
I'd like to understand
On a typical managed switch (1Gb Ethernet/10Gb Ethernet), ...
2
votes
2answers
307 views
Stop unwanted network traffic on second nic
I work for a company who make a networking product.
The device we create is attached to the testing PC via a second NIC and is on a seperate subnet to the primary nic on the corporate lan.
We are ...
3
votes
1answer
315 views
one particular laptop does not receive UDP broadcast messages
I am trying to debug a problem with a particular laptop which is running Ubuntu. We have a service which uses broadcast UDP messages, and this laptop is not receiving them on its wireless interface, ...
1
vote
1answer
460 views
Passing Wake On LAN traffic across subnets with Dell PowerConnect 62xx
I am working on an SCCM project that requires powering on computers in the middle of the night to run updates. SCCM can send the WoL packets, but I am struggling to figure out how to pass this across ...
2
votes
2answers
79 views
Need confirmation on layer 2 security question
I need confirmation on a question regarding layer 2 security. I've been doing research and I just need to know that I understand it correctly.
Basically, if you have a LAN with a few machines ...
0
votes
4answers
1k views
How can I “kill” a computer network services on my lan?
I'm in a strange situation...
A customer has a huge network based on static ip.
All machine names are not useful to identify a computer location and network switches are not managed.
One of the ...
2
votes
2answers
1k views
what should be the destination MAC address for a limited broadcast address(255.255.255.255)
configuration: host(H1-10.10.10.55/24) has a default gateway(g1) 10.10.10.1/24.
Question 1:H1 sends a packet to 255.255.255.255. What should be the destination MAC address in the outgoing frame?
...
0
votes
2answers
716 views
How to route broadcast packets from machine with two network interfaces on same subnet
I run RHEL 5 and have two NICs on one machine connected to the same subnet:
eth0 192.168.100.10
eth1 192.168.100.11
My application needs to receive and transmit UDP packets (both unicast ...
24
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4answers
1k views
2
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2answers
354 views
Rebroadcasting videostream from IP-camera
The problem is the following: I have a camera D-Link securicam dcs-2121 (http://www.dlink.com.sg/products/?idproduct=310) it has its own web-server and works perfectly with a few connected users, but ...
1
vote
1answer
896 views
Iptables - Allowing only a single dhcp (relay) client
I am trying to create a firewall rule on an Ubuntu 10.04 server running isc-dhcpd. I only want dhcp to be accessible by a single relay host (172.1.1.1). I have iptables set up like so:
# iptables ...
1
vote
2answers
217 views
Microsoft Networking - WINS, DHCP, considerations for moving from a flat to routed network
We are moving our network from a flat 192.168.x.x/16 to a routed network to be composed of several /24 subnets and a layer 3 switch.
It is a Windows network, active directory integrated, standard ...
