Networking refers to the technologies and techniques that enable the interconnection of devices and applications allowing them to communicate electronically.

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iptv set-top box cant route to the internet

I am trying to setup an iptv server. This server should run DHCP service, web server, and also a router. the linux box has 2 Physical NIC. Eth0 : (DHCP Service) : 192.168.98.100/32 ...
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2answers
31 views

Network share as USB connected device

I have a situation where I am having to work around a medical vendor who has for security reasons limited the connectivity to a system. The only connection I have available to the system is USB and ...
0
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0answers
17 views

What are the Resilient Overlay Network (RON) downsides?

What are the RON downsides? How this type of network handle with security questions? There are vulnerabilities? The RON's performance is good? Thanks in advance!
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1answer
38 views

How to diagnose/troubleshoot tftp timeout

I have 2 VMs. One is setup as a pxe server (dhcpd with a specific subnet and a tftpserver). The second VM is networked with 'vboxnet2' to first VM and it is able to get the DHCP IP as specified my ...
1
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1answer
44 views

Group Policies Not Applied At Startup with SSD PC

I have a problem with some new computers containing solid state drives which will not apply group policies at startup. All other PC's apply the GPO's no problem. Manually running gpupdate /force ...
1
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0answers
48 views

forcing proxy traffic to route via a specific 3G dongle interface

I've searched for details on how to do this but I've been unsuccessful - I wondered if someone could offer up some advice. I have 2 network cards (LAN and 3G in my case), LAN is my main interface ...
0
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0answers
10 views

Ubuntu KVM host

I got a default installation of Ubuntu 14.04 on my lab-pc and wanted to run a few VMs there using the virtual machine manager. I followed the official ubuntu docs and actually everything seems to be ...
0
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2answers
32 views

Does 802.1x on a Wired Network Prevent Remote Management?

I'm researching the feasibility of implementing 802.1x port security on my wired network. The supplicants will be Windows 7 PCs. The authenticator will be Cisco and Juniper switches. I'm thinking ...
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1answer
33 views

Linux host does not retransmit with a lower packet size in response to ICMPv6 Packet Too Big message

I'm seeing this in Wireshark when curling this URL: On the same network, a Windows host retransmits properly, but an Android host does not. On a different network (presumably appropriately ...
1
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1answer
46 views

Best way to connect dual SSID / VLAN wireless to Watchguard firewall

I'm currently sorting out our network so we can have new wireless access points with dual SSIDs, one for internal use and one for guest use. These will be setup so each SSID is on a different VLAN. ...
0
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2answers
41 views

Hyper-V guest doesn't see the internet through external virtual switch

I have a Windows Server 2012 R2 Essentials host with 1 NIC and I installed a Hyper-V guest of the same type (Windows Server 2012 R2 Essentials). I added an external virtual switch (allowing management ...
1
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1answer
22 views

Forwarding ports from one bridged interface to a guest container on host OS

I have a simple configuration. Mind map how everything look like So I have a structure: Proxmox Host OS (vmbr0, vmbr1) Container 1 (eth0) Container 2 (eth0) The Proxmox networks: vmbr0 ...
2
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1answer
40 views

How to configure network interface with chef ifconfig resource for IP determined at recipe runtime

I'm working with Chef through Amazon Opsworks and need to provision and configure additional network interfaces for some of my servers, and I'm having trouble figuring out how to properly use the ...
2
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1answer
42 views

Juniper EX3200 connected to Cisco 2900 series router - incomplete ARP entry

I'm tying to connect a Call Manager Express running on a Cisco 2900 series router to a Juniper EX3200 switch. I have both configured on VLAN 4, with both ports in access mode but when I connect the ...
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2answers
53 views

connecting two switches with different ip ranges

I have two switches that assign different DHCP IP addresses. one assigns 192.168.0.x to devices that are connected to it and the other one assigns 10.0.0.x ip addresses. Is this the reason I cannot ...
1
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0answers
18 views

Why does a VPN fixes connection issues on games [closed]

My ISP company is giving me troubles when I play some online games. While monitoring the network using WireShark, I was able to identify a TCP Retransmission on a packet with a certain sequence number ...
0
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1answer
37 views

Why is TTL increasing? (and generally behaving erratically)

Summary: TTL is not decremented when pinging hosts on a "network path" My laptop (10.10.13.10) is connected via OpenVPN to a server (10.10.13.1) which hosts several network interfaces. One of them is ...
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0answers
32 views

What is the difference between arp_ignore and arp_filter?

What is the exact difference between the arp_ignore flag and the arp_filter flag defined in syctl.conf in Linux? Both seems to serve the same purpose.
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1answer
37 views

how to change the auto-negotiation to yes in linux servers

when I run the ethtool command on eth0 ( on VM machine redhat version 6.7 ) I see Supports auto-negotiation: No can we change this to - auto-negotiation: yes ? , is it configurable? ethtool eth0 ...
0
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0answers
23 views

Ldap server cannot accept Public IP

I have this LDAP server and 10 clients in the network. 2 clints can connect to server using server's private ip (10.10.10.10), but the other clients cannot ping private ip, so they use public ip ...
32
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2answers
4k views

Network printer exploited (read: hacked) to print antisemitic documents. How to fix?

I'm unsure if this should be asked here or over on security.stackexchange.com... Over the Easter long weekend, a small office of ours had a network breach in that an old HP printer was used to print ...
0
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1answer
103 views

Windows server 2008 File Server problems

First of all i would like to apolagies for my lack of knowladge in this matter but with your help i hope i can fix the problem. Here's the situation: We have a Windows 2008R2 Server running ...
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0answers
17 views

changing the IP address of rock compute node

In a cluster where the server is Centos-6.5 and the compute nodes are Rocks, I have changed the IP address of the server. Problem is, the compute nods stuck at the grub> prompt and they are not ...
0
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0answers
18 views

WCCP to Remote Cache Engine - Any limitations?

I am attempting to WCCP to a remote (cloud hosted) cache engine from an ASR 1900 series router that is performing NAT. According to my reading (which was mostly done on ASAs) the WCCP cache engine ...
2
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0answers
15 views

Allowing outbound internet access with NSX while maintaining micro segmentation

I am getting into the world of VMware's NSX product for the purpose of micro segmenting VM's in the datacenter. That is to say, living in the same network space but not being able to talk to one ...
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0answers
28 views

Which virtual/software switches support meter table (QoS) in OpenFlow v1.3 [closed]

Does anybody know which virtual/software switches support OpenFlow v1.3 meter table QoS feature?
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1answer
35 views

How to figure out what is the gateway and interface in routing table [closed]

So I've got this simple yet very confusing at least for me problem, to determine what is the interface and ip next gateway from a router to network. Lets say we got setup like this - . And if I ...
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1answer
31 views

Hot-hot systems and its effect on RPO/RTO

How is hot-hot or live-live system related with RPO and/or RTO? I want to understand what exactly a hot-hot system means? Is it really achievable? How does it affect the RPO and RTO? Here's the link ...
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2answers
49 views

Why do different packet analyzers sometimes produce different results?

I ran wireshark and windump at the same time. Both packet analyzers use the same winpcap library. However after doing a row by row comparison of the results I noticed both every column between the 2 ...
0
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0answers
558 views

Using NAT in qemu

I have used Qemu to install a windows xp guest. The command I run is qemu -m 2048 -gda winxp64.img \ -boot d -usbdevice tablet \ -enable-kvm -vnc :10 \ -netdev user,id=network0 -device ...
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1answer
65 views

Deep packet Inspection Stenography [closed]

I'm trying to develop something that can get around Deep Packet Inspection so that rather than looking like OpenVPN traffic etc, I could put all that into HTTP packets as extra information or some ...
3
votes
1answer
47 views

fallback route to drop packets if output interface that is NATed to goes down?

Background: I establish a connection to a 3rd party VPN and NAT packets marked as part of a particular cgroup (in order to selectively run processes through the VPN or not) to the 3rd party's VPN tun ...
0
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1answer
32 views

How to force Centos to use ipv6 interface only?

My Centos server has two virtual (Openvz) interfaces. One from these interfaces has ipv4 address configured, while the other one has the ipv6 one. In short this server is used for browsing / proxy. ...
0
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1answer
30 views

Setting up subdomains

Rookie question here. Please correct any shortcomings in my knowledge so far. If I have the domain ex1.example.com and wanted to have it point to one server and then had another server on the same ...
2
votes
3answers
83 views

What does -P INPUT ACCEPT mean with regards to iptables?

I'm fairly new to iptables, and am trying to figure out if I've configured my ruleset appropriately. With regards to the -P INPUT ACCEPT part of my question, I am trying to determine if this is valid ...
1
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0answers
32 views

How to correctly set up a bridge interface in GCE

I'm trying to set up a bridge interface as described in many docs, for instance: https://help.ubuntu.com/community/OpenVPN My setup in identical to that one, except obviously I used my GCE internal ...
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1answer
35 views

How we can control the internet of our faculty at university? [closed]

I have a problem, in my faculty at university (CS) we will have our own internet line(30Mb), this is fast compared to the regular internet that provides us the university (really more slow and very ...
0
votes
1answer
42 views

Route internet traffic over other IP in same subnet

I am looking to create a pseudo-fallback WAN connection in my router which does not natively support this. I have a network of 192.168.93.0/24, my 'main' router and default gateway is on ...
4
votes
1answer
232 views

VMware VDS ERSPAN decapsulation on Cisco Nexus 7k and mirrored to local port

We are setting up a mirror/span/rspan/erspan to get traffic (DC's live as VMs in ESX Cluster) to our Microsoft ATA server. The problem that we are running into is that a traditional RSPAN is not ...
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votes
1answer
112 views

Separate subnet with exceptions [closed]

I have a network with clients in the 192.168.30.x range and clients in the 192.168.40.x range. both are in a 255.255.0.0 subnet. All clients with .30.x are connected to one switch and all clients with ...
1
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1answer
37 views

HDD Choice - Single Server - 20 Users

A client of mine has 3x 300GB 15k SAS Drives in RAID 5 setup. He needs more storage space, and I'd like to replace them given their current age. I was thinking of replacing them with 3x 1TB 7K SAS ...
2
votes
1answer
55 views

Restarting networking on Debian Jessie

I would like to know which is the right method to restart networking service in Debian Jessie. I know that I can use: service networking restart or /etc/init.d/networking restart that anyway ...
1
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1answer
36 views

Cannot access website but others can

My problem is that, I have just set up a server on my internal LAN and now it is in a datacenter. Everyone else can access the server and use it as normal. I however, cannot. When I ping the domain ...
0
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0answers
49 views

Where are network namespaces in lxc / lxd?

I am trying to understand namespaces in the context of lxd / lxc. I have two containers which respective eth0 is bridged to br1 and br2 on the host. This is done via a Virtual Ethernet interfaces ...
0
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2answers
112 views

Gateway Anti-Virus vs Desktop Anti-Virus

I need your help with a question on Gateway Anti-Virus and Desktop/Server Anti-virus. The example I have is the following: You have a network of 50 machines (Desktops/Servers) which includes a ...
1
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22 views

Configure Cisco QoS for VLAN

I have two VLANs (20 and 21) that are accessing the same resource on a switch. Clients on VLAN 20 access this resource only at schedule times, but when they do, they generate lots of traffic as ...
0
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1answer
54 views

Unable to Ping a server IP which is outside the subnet mask

This is the setup we are having: 2 servers which are in HA[High Availability Network] are configured with the following IP address Server 1 --> 10.54.48.x and Server 2 --> 10.54.49.x. There is a ...
0
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2answers
113 views

ubuntu 14: how to configure bridge for bonded interface?

We have a server connected to 2 switches via two NICs. On each NIC are 2 VLANs, management and production. Right now we only have one switch connected, so haven't setup the spanning tree etc. We ...
4
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3answers
636 views

Can only some machines on a network have a public IP addresses?

Is it possible for some computers on a network to have their own public IP addresses and serve content over the internet while other computers on the same network only have private IP addresses but ...
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38 views

Ping problems with two interfaces, same subnet, direct connections to two separate hosts

I have a configuration of a client machine (Ubuntu 14.04.2 LTS) that directly connects to two server machines. The server machines--while on the same subnet--cannot route to each other. Packets must ...