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

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Network problems, can't ping my mac

I run VMware Fusion 7.1.1 and an Ubuntu server 14.04 on my imac 10.10.3 for web development. I have a thunderbolt Promise connected to the mac and mounted this on my ubuntu using smb, everything ...
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7 views

NAT forwarding (whole IP) working only on some ports

Since my hoster doesn't allow briged setups I had to go for a NAT solution to run my CentOS VM on an additional IP and my host machine on the primary IP. Now, I've got a problem since for ports 22, ...
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1answer
38 views

Two separate internet connections, two routers, one server and multiple clients [on hold]

Recently we have got second internet connection from different ISP and now we are having a problem connecting our server to both routers which should be accessible from any client connected to any of ...
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0answers
13 views

Routing is disabled for LAN users while choosing all-net for IPSec tunnel

I have VPN with L2TP/IPSec server and tunnel configured. When I choose all-nets 0.0.0.0/0 to allow connection from any computer in the world, all LAN users with subnet 10.0.0.0/8 are disconnected from ...
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1answer
27 views

Share a folder programatically with custom credentials

Is it possible to share a windows folder with custom credentials (rather than a windows account)? I'm developing internet cafe software. I want to mount a desktop folder from a network share upon ...
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0answers
22 views

Total no. of hosts with 2 NATs in the whole network [on hold]

How many hosts we can have with two NATs in the whole network if in IPv4 all the ip addresses are allowed to assign to a host in the network.
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15 views

GPON Gateway Settings

So recently my ISP installed optical fiber device. From the device description according to the gateway setting, it's a GPON Device The default package by the ISP is set to 4mbps. But when I started ...
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0answers
15 views

Need all local traffic through Debian - Routing?

Been dealing with this for some hours now and my head are really spinning. So I got this cable network router (192.168.0.1) that Im trying to pass all my local traffic to. But I cannot for the life ...
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34 views

Slowness in Mac-based business network [on hold]

My treatment room former dell PC/running vista business/ running the server and network versions of my Dental practice mgmt & X-ray capture apps, had no problems connecting to the front desk iMac ...
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0answers
24 views

Save IP Camera stream with PC alternatives [on hold]

I need to purchase a pair of IP camera for my small office. The model we want supports H.264, MPEG-4 and MJPEG. The manual lists it supports OS windows xp/7/vista. We only run Linux in the office ...
-1
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1answer
34 views

How to schedule firewall to block wan connection on Windows 7 [on hold]

I have a camera on my pc. There are 3 NVR (network recorder ) on different network connected to my cam throug WAN connection. I need to block any NVR from accessing my camera in different hour, and ...
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0answers
12 views

ESXi 5.5 - Management network with no gateway [migrated]

I'm setting up a test lab for VMware in Hyper-V. I have 3 vSwitches in Hyper-V: -EXT01 -INT01 -INT02 I've also created a W2K12 VM in Hyper-V which has the following roles installed: -AD/DNS -DHCP ...
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0answers
54 views

DNS problems with a static IP configuration in a VM [migrated]

I am using Parallels Desktop 10.2 for Mac on OS X Yosemite. I am trying to configure my my client (Ubuntu 14.04) to host a website that is available to the host via a particular domain name. In the ...
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1answer
42 views

why my nat iptables rules dont work with marked packets?

System: debian squeeze, Linux server 2.6.32-5-amd64 #1 SMP Tue May 13 16:34:35 UTC 2014 x86_64 GNU/Linux, iptables v1.4.8 lsmod | grep iptable iptable_security 2176 0 iptable_mangle ...
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2answers
32 views

Combining two subnets with same default gateway

This is the current situation: Subnet 1: 192.168.1.x (255.255.255.0) with default gateway on 192.168.1.1 Subnet 2: 192.168.90.x (255.255.255.0) without any gateway (no internet access) -> all ...
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1answer
53 views

Multiple DSLs connected to single HP server

networking noob here! Got a pretty specific question. Is it possible to plug 10 cat5 (network) cables that come from 10 different DSL modems to an HP server so I have 10 different broadband lines ...
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1answer
17 views

How to route VPN traffic through a separate internet connection with a SonicWALL firewall?

We have a depot quite some distance from the exchange, the expensive internet connection is only getting 2/1Mb. This causes constant drops as soon as someone downloads anything. We have now got a 4G ...
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1answer
20 views

Static route to Single IP using SSL connection

I am trying to configure a static route to a single IP. My question is two fold: How do I specify a single IP using a subnet mask x.x.x.x/? (not a range of ip's) My pc is making an SSL connection to ...
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0answers
23 views

Why would my logged public IP differ depending on the type of server (or computer) I am connecting to? [migrated]

I am writing a p2p gaming lan emulator that uses the torrent infrastructure to network peers, set up lobbies, etc. Currently, the only infrastructure we are using is the trackers (we plan to us Tox ...
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0answers
15 views

Connect 1 computer with to 2 networks, route through 1 VPN

Suppose the following scenario: I have a question, I am sure it has been asked but I do not know how to word it or what to look up. My Problem: I am a high school student of an advanced Video ...
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1answer
16 views

error 500 web page share point [on hold]

In my environment we are having 3 branches eg:A B C all the branches are protected with cyberoam firewall also ..and IP to IP trafiic is Allowed to all three branches. Recently A branch is able to ...
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22 views

Filtering KVM guests with IPtables

My partner has a server with OVH that receives a constant variety of ddos attacks, while still staying up. We want to use IPtables on the host to filter the guests VM's traffic. The guest VM we want ...
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0answers
12 views

GigaVUE-420 ERROR: failed in probing PCI device [on hold]

A unit that was picked up was booting to the RedBoot prompt, but I was able to get it to load the image now I am getting the below message on bootup, and then it hangs. +eth0 mgmt port: NO LINK No ...
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0answers
17 views

Routing traffic using IP tables for two NICs [closed]

I have two NICs (eth0 and eth1). I want to block all traffic (Incoming/outgoing) on eth0 except for port 25 and 993, and allow all other traffic (Incoming/outgoing) on eth1. What's the easiest IP ...
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0answers
36 views

ESXi + pfsense traffic segregation [migrated]

I'm kind of new to setting up networking with ESXi and working with pfsense, so please excuse if this cannot be done or I'm asking something the wrong way. I'm using ESXi 5.5.0 and I want to host ...
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0answers
5 views

Can I use same suricata instance for both IDS (for L3,4) and IPS (for L3,L4,L7)?

I have a interface where traffic is flowing from internet to NGINX server to application server. I want to monitor (IDS) the traffic flowing between Internet and NGINX at L3,4 and IPS the traffic ...
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0answers
39 views

Subnetting and VLANs for Multiple Buildings Strategy

Curious for a little feedback on how others do this. A site I'm looking at has multiple buildings connected by fiber and each is on their own subnet. 192.168.0.0 - Building 1 - VLAN10 192.168.1.0 - ...
10
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1answer
130 views

Vendor whitepaper says: 5Mpps no prob. I'm already hitting a wall at 120kpps. Where's the bottleneck?

HP's whitepaper on their QLogic (fka Broadcom) NetXtreme II adapters, which includes the specific NIC that I'm testing, states (page 7) that their small packet performance for packets up to 256 ...
0
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1answer
26 views

Forcing traffic through an IPS on a flat network through a bump in the wire

I have the following topology: Click here, unfortunently I don't have enough rep to post images Essentially I would like the packet flow to go from PC1, to the Core Switch, to the Edge Switch, and ...
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45 views

Understanding a computer providing a bridge to the Internet [migrated]

Where I work we have a very old Linux machine that is doing our DNS/DHCP and other network services. That machine is our Default Gateway and all internet connections go through this computer somehow. ...
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32 views

socat TCP file server

I'm trying to set up a simple socat fileserver using TCP to send small files (~100KB). Here are the one-line servers and client for one file: Server: socat -u -d -d OPEN:file.dat ...
1
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1answer
40 views

Tcpdump/Iptables on bridge interface without assigned IP address

I have set up a bridge interface without an ip on it. $ brctl addbr br0 $ brctl addif tap0 $ brctl addif tap1 $ ifconfig br0 up As seen above, this bridge is connecting 2 TAP interfaces setup ...
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1answer
44 views

CentOS 7 disable predictable network interface names during install

I know I can use net.ifnames=0 biosdevname=0, with grub, to disable predictable network interface names. This names the first interface as eth0 instead of enp0s3, or whatever. How do I specify this at ...
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2answers
116 views

Add a fake hop in tracert?

A client wants to add a fake hop when someone does a traceroute on his IP address. He has two ip addresses, and one interface (no problem, virtual interfaces solve it). How should I proceed? Is this ...
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0answers
27 views

Internet access not working on VPN set up with OpenVPN: DNS issue [closed]

I need to set up a VPN using OpenVPN to use it in my project. I did my researches about this subject and I found that the best solution is using OpenVPN. And I try to find a solution to set up a VPN ...
1
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0answers
9 views

Load balance 2 wireless adapters on 2 different computers (ie. w/NLB)

I have 2 physical servers running 2012R2. Each box has its own wireless nic. I also have 1 SSID to which both servers/WLANs connect to. While trying to setup NLB, I noticed the Wireless NICs didn't ...
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2answers
28 views

iptables blocking script using arp table lookup

I need to block certain hosts (multi-OS) on our LAN from gaining internet access. I decided to try and block certain hosts by mac address via iptables but I can't use the mac address of the ...
0
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1answer
12 views

Private VLAN on single port

I am trying to separate a group of computers (5 to be exact) from an entire network, but they still need to login from ad dc. Those computers are on a different floor, they have static IPs, and they ...
0
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1answer
22 views

route output traffic from specific NAT'ed VM via ip alias

In a dedicated server with several containers behind NAT, I'm trying to route the output / outbound traffic from one of the containers through a specific virtual interface attached to the main ...
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0answers
16 views

home network bridge + access point [migrated]

I want to create a wired bridge to a wifi setup a firewall + intrusion detection and then setup a wifi-access point for lan-out I currently have a d-link 1200 extender setup as bridge, my desktop ...
4
votes
2answers
54 views

DHCP server on subinterfaces

I have created two subinterfaces on eth0 : eth0:0 with IP 192.168.10.1/24 eth0:1 with IP 192.168.11.1/24 Configured /etc/dhcp/dhcpd.conf like that: option domain-name-server 194.204.159.1; ...
0
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2answers
51 views

Is the MAC address of the physical host used in a virtual environment?

In an environment with virtual servers, is the MAC address used to communicate, the MAC address of the physical host, or the MAC address of the virtual adapters. If it's is the virtual MAC address how ...
0
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1answer
37 views

EC2 Network Interface with secondary Private IP, not showing on Interface in Windows

I have a windows server 2012 r2 instance on EC2 under VPC, I have two Network Interfaces. The Primary Private IP is shown in windows for both. I have a secondary IP address on one of the network ...
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1answer
35 views

How will the LAN to LAN firewall rule affect the traffic in the rest of the network

I have a following network setup (of course a bit modified from the real situation) I would like to setup a LAN to LAN rule on the ZyWALL firewall so that only certain ports/ip adresses are allowed ...
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1answer
26 views

Enlarge IP Network Address Space

Our small company uses a 192.68.0.0/24 network. As there are only 256 IP addresses, we will be running out of IP addresses soon. I wonder about the best strategy to change the network. Some devices ...
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2answers
30 views

Is a “bridging device” required to join two networks?

We're considering two NBN fibre connections to the Internet (NBN is a fibre connection for those of you not living in Australia), with each connection having it's own subnet. The first connection's ...
0
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1answer
44 views

Windows Server 2012 - Prompt on accessing network resource from server hosting resource

Here's an odd one that I've not been able to crack. For my home lab setup, I've got two near identical physical servers that run Windows Server 2012 R2. The goal of my home lab setup is to be able ...
1
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1answer
18 views

Windows 7 x64 Enterprise all network printers greyed out on reboot

We've got a bunch of network printers on SL7 running CUPS. These are distributed via GPP printers. This all works with older images. In the last week or so, new installs from the same base image are ...
1
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1answer
42 views

VPN (PPTP) connects successfully but unable to ping some devices in the LAN

My working company has this router (Cisco RV042G Gigabit Dual WAN VPN Router) and it has the IP 192.168.1.1 with subnet mask 255.255.255.0. It has 3 devices directly connected to its LAN ports, an ...
4
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1answer
81 views

Iptables LOG rule inside a network namespace

I'm trying to setup iptables rules for a docker container. I'm using nsenter to execute the iptables command inside of the container's network namespace: # log access to port 8080 PID=$(docker ...