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2
votes
0answers
31 views

How do I prevent directed broadcast packets in Hyper-V using virtual network adapter

When I connect two physical subnets by using a Cisco Router, I can configure the router to disable directed broadcasts (that could be used for example to send Magic packets for waking up Computers ...
4
votes
1answer
254 views

How does an Access Point handle broadcast packets from the wired side?

I have an Cisco AP 1242AG autonomous AP connected to L2 switches. Let's say I have 100 wired devices each sending 2 broadcast UDP packets per second. Obviously these packets will reach the Access ...
1
vote
1answer
222 views

Does Azure support UDP Broadcast?

I am aware that Azure supports UDP, but does it support UDP broadcast? I am wanting to use the Jenkins Swarm plugin, which requires UDP broadcast for new slaves to join the master.
0
votes
0answers
339 views

How change Broadcast ip address manually (CentOS Machine)

i figured out subnet mask & broadcast ip addresses of eth0 device in my CentOS machine are different from datacenter email. datacenter email was like below : Free IP: ...
-3
votes
1answer
76 views

Bandwidth requirement to live broadcast an event on the internet [closed]

I am assigned on project to live broadcast an event on the internet which may have 50,000 user s. This will be a broadcast so all users will see same live video. My query is what would be my bandwidth ...
-1
votes
1answer
235 views

Several logical IP subnets within single physical Ethernet broadcast domain? [closed]

I'm using Xubuntu 12.04 and Wireshark to analyse network traffic in my ISP subnet I'm wired to. My system has the following IP configuration: IP Address: 10.10.103.28 /24 Subnet Mask: 255.255.255.0 ...
0
votes
0answers
240 views

How to configure Linux to send broadcast packets via a specific network interface?

I've read that OS sends broadcast packets via the 1st interface with IFF_BROADCAST and that you can set/clear this flag with ifconfig [-]broadcast (without an address). But this doesn't work. In my ...
1
vote
1answer
981 views

How do I add a broadcast IP to the loopback interface under os/x using ifconfig when my machine has no network? [duplicate]

I'm new to advanced network administration and I would like to do some testing with UDP broadcasting, so I need a broadcast address on my loopback interface. The machine is offline, in other words, ...
-1
votes
2answers
128 views

What is the equivalent of 127.255.255.255 for OS/X machines so I can test broadcast udp packets without a network? [duplicate]

I am trying to test my program that makes use of broadcast UDP (not multicast!). In Linux, I can use the 127.255.255.255:64651 address and everything works beautifully, in other words, I send a packet ...
0
votes
0answers
352 views

Tomato RT-N16 - How to Prevent Multicast Packets from Reaching OpenVPN clients (TAP)

We have a remote (like in the woods) client using a VPN connection to connect to our office, using this link we can monitor and operate the remote client without a few hours drive in the wild. This ...
0
votes
2answers
48 views

How to broadcast a command on Windows

I am going to frequently deploy different versions of a program on a cluster of Windows machines (mostly Windows XP), so I am willing to use a command-line broadcasting tool (either built-in or ...
0
votes
1answer
244 views

Broadcast forwarding using Linux router

I have 3 VLANs connected by a Ubuntu box acting as a router. Unicast packets are properly routed (machines can ping across VLANs, etc). I am now trying to get broadcast working. I want to be able to ...
2
votes
0answers
88 views

Is there a way to catch system broadcast messages

Is there a way to catch system broadcast messages (like those which are send to all tty users to inform of a shutdown) and send them via e-mail to a user?
0
votes
1answer
354 views

Linux network interface broadcast statistics

I am looking for a way to see the number of Ethernet broadcast frames transmit/received by the network interfaces. I am familiar with many Linux commands,procs and options to get interface statistics ...
3
votes
2answers
625 views

What is this in my syslog and should I be concerned?

I'm seeing a lot of the following line in /var/log/syslog: Jun 21 14:36:15 my-server kernel: [416219.080061] iptables denied: IN=eth0 OUT= MAC=ff:ff:ff:ff:ff:ff:the-mac-address:08:00 SRC=0.0.0.0 ...
2
votes
3answers
980 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 ...
2
votes
3answers
2k 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
265 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
514 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
61 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
1k 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
44 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 ...
-3
votes
1answer
201 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
735 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
1k 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
1k 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
1k 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 ...
3
votes
1answer
235 views

Is it necessary to manually set the interface broadcast address?

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 that the new ...
1
vote
2answers
267 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
512 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, ...
0
votes
1answer
435 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 ...
1
vote
2answers
2k 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
193 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 ...
1
vote
1answer
621 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
111 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
2k 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
1answer
673 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 ...
3
votes
2answers
1k 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
147 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
737 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
125 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
450 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
936 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
187 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
597 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 + ...
1
vote
2answers
394 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
vote
1answer
612 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
529 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
2k 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
1k 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 ...