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

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Using a 1G Ethernet Pass-Thru with BL460C G7 blade?

I've installed a new G7 BL460C into my HP BladeSystem C7000 enclosure. I have not had a G7 before. In the enclosure I have two 1GB Ethernet Pass-Thru interconnect modules (406740-B21). I am able to ...
5
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3answers
467 views

Effect of distance from server

i have a web server in Ireland (Amazon AWS), this server appear fast from germany (orange line) and slow from USA (black line). The request used for test is the same. I think this is normal... ...
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9 views

PostgreSQL not listening on local eth1 after reboot

I have a server with 2 networking interfaces - global on eth0, and local on eth1 with IP like 10.181.xx.xx. Running Ubuntu 16.04. I set up PostgreSQL to listen on this local address, so another ...
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0answers
5 views

Searching a good tutorial that explains WISP, WISPr and WISPAccessGatewayParam XML to enable seamless roaming [on hold]

I'm developing a hotspot system what runs a captive portal where the user needs to confirm some terms and than he will get a session for a few days on all hotspots even with different providers. Now ...
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0answers
6 views

How STUN and TURN servers work with the implementation of ICE? [on hold]

I've studied some articles about their working but there are lot of confusion like why STUN servers have 2 IP Address and what is ICE candidate gathering? How NAT is causing problems in Session ...
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11 views

Two untagged VLANs on one port (ProCurve)

Goodmorning I'm setting up a new network. My problem is that i have a management VLAN 99 and an IT VLAN 89. Now i want to connect my laptop to one port and access both VLANs. Because when i'm at my ...
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0answers
10 views

How to use host internet which is using http_proxy?

I have a virtual machine which is connected to host with NAT and host only network. if my host is using open internet my guest(RHEL 7.1) can easily use host's internet. If my host is configured with ...
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17 views

Digital phone system over fibre optic

I'm a bit of a novice in this area so please forgive me if this is a stupid question! I have some experience wiring up simple CAT5/6 networks and have also setup and run digital phone systems through ...
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1answer
21 views

how should I divide a network into several smaller vlans on a extreme switch?

I get a C-network from my ISP, and there's a static route in ISP side pointing to one ipaddress(192.168.0.2) in my C-network so that this C-net can be reached from outside world. I use a Extreme X460 ...
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1answer
31 views

Unable to connect two PC's in a private Network

I have the following setting: VM1 (VMNET10 - private, without any other connection to the host system or the internet) VM2 (VMNET10 - same here ;)) Now i want to connect each other. I can ping ...
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27 views

How to setup VM network such that they all have different public IP addresses

For example, in Azure or Digital Ocean or EC2, we have an option of creating unlimited number of virtual machines. How does each of these VMs come to have different public IP addresses. More ...
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20 views

Ubuntu LAMP server disconnects after some time

I am trying to move my websites from shared hosting to the vps I rented, so I am trying to set up LAMP stack. After installing all, the server works fine at start, when I visit it's IP address on ...
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0answers
9 views

Samba4 DC for VPN

I use an strato root server with Debian 8. Now I installed an l2tp/ipsec Vpn server, the interfaces name is ppp0. Now i want the new installed and provisioned samba4 DC to only be used over that ...
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0answers
27 views

Windows Server 2012 and VM Ware Network, Host Cannot Ping Guest

I recently setup a home network so I can practice network administration at home to supplement my knowledge and improve my confidence in my programming career. I have been working out the kinks for ...
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23 views

Can IPv6 connectivity between countries be unreliable?

I’m setting up IPv6 on my existing VPS and backup server. The VPS is located in Fremont on Linode, and the backup server is located in New Zealand. I have several VPSs within the Fremont data center. ...
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0answers
11 views

2 networks and switching gateways in Asus routers based on source ip address [on hold]

I am sure this would be very common problem but I am unable to search correct forum where this has been solved. I have got limited knowledge of networking and need some one to advise me on my problem. ...
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0answers
88 views
+100

CentOS 7 connectivity issues

I have a second CentOS 7 box that's having a lot of trouble connecting. Basically, we were running WHMCS, but a domain lookup kept failing. So the issue is IPv6 connectivity. [root@da01 ~]# yum ...
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1answer
15 views

How to forward specific packets from a machine to another machine? [closed]

I have a network with 3 linux hosts, A, B, and C. I want to send 1,000 packets from A to B, and B should automatically forward it to C. How should I do it? B has one adapter with IP 192.168.1.100/24 ...
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0answers
16 views

How to run a function for every specific received packet? [closed]

I am doing an experiment for my master thesis. I want to run a function (e.g. multiply two numbers) when a specific packet is received (e.g. a packet with destination TCP port 6666). For example, I ...
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2answers
50 views

Which Ports need to be accessible on a Domain Controller for Clients to logon?

We are currently segmenting our network. We will move the servers in another subnet than the clients. Of course the clients still need access to the domain controller to authenticate against it. I ...
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0answers
2 views

Linux Bridge (vmbr) has no connection to physical NIC [migrated]

I built myself a new home server and wanted to use Proxmox VE. Its Debian based and I have 3 KVM-machines running. Machine 1: "Sophos UTM" has WAN on vmbr0 and DMZ on vmbr1 (192.168.200.254) Machine 2:...
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12 views

Can't access network externally [closed]

The network was working fine yesterday, but today I cannot access anything on the network outside the house. The browser still sees the server, but everything times out. Also the same case with ssh. I ...
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1answer
37 views

Output multiple VM's to only 4 IP addresses ESXI

I have set up a computer as an ESXI environment. The system has 1 physical network port. When I create network ports on my virtual machines, each gets an IP address assigned by my router. I need to ...
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0answers
17 views

Cannot ping one specfic website within my company network [closed]

Within my company network I can browse and ping every external website besides my company website (e.g. example.com). If I try to browse example.com I receive an ERR_CONNECTION_TIMED_OUT. If I try to ...
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14 views

What are Gateway & Broadcast in Dedicated Server? [duplicate]

We recently purchased a dedicated server. When server details were delivered to us, we are given some more info along with the root login. Those are: xxx.xxx.xxx.24/30 - Network xxx.xxx.xxx.25 - ...
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1answer
22 views

What kind of emulator can i use to learn Cisco Router Configuration? [closed]

I am going through my CCNA materials. I came across this one topic called configuring the router. Now, i don't have a Cisco Router but i still want to go through the commands and see the results live. ...
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1answer
17 views

Linux port forwarding that automatically tries to establish a connection to the far side while keeping the originating side waiting [on hold]

I've been playing around with port forwarding for web servers What I'm looking for is a way to forward the port in such a manner that even if the connection to the forwarded port is down for a moment,...
2
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1answer
47 views
+50

Windows server ignoring DNS resolution on private interface

I have a Windows 2012 server with two interfaces - public internet facing, and private. The private interface uses our internal DNS servers. This interface has no gateway. Static IP - not DHCP. I ...
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1answer
19 views

how do I measure the maximum network bandwidth? [closed]

For the test client and the testbed, when there is no other traffic on the link between them, how do I measure the maximum bandwidth?
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0answers
8 views

Systemd Networkd [Match] Rule Multiple Matches

If I have a static network configuration like this: [Match] Driver=mlx4_en [Network] Address=10.1.0.10/24 Gateway=10.1.0.1 DNS=8.8.8.8 and say I have a dual port NIC which uses the driver mlx4_en ...
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10 views

Why does reading /proc/net/tcp take a long time ss is quick to return the same sort of data about the connections table? [migrated]

On Linux 2.6.32, if you read (for example, cat) /proc/net/tcp, on a very loaded system (for example, a web server), you will find that reading 100K entries takes over 30 seconds. That's a long time. ...
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0answers
14 views

How can I find the docker-machine network adapter name for a docker container?

I would like to introduce network variability into docker containers. Specifically, I would like to be able to run commands such as: sudo tc qdisc add dev vethecb732a root netem delay 500ms 400ms ...
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0answers
13 views

Keyboard and Monitor not getting detected on HP Proliant Server

I am having an HP Proliant Server running Windows 2008 Standard on it. Since one day we are not able to access it remotely. So I have checked the server I can see all the lights and fan is running ...
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3 views

Monitor network traffic by FireQOS class?

I'm using FireQOS (which is basically an abstraction on top of the Linux tc qdisc mechanism as well as iptables) to classify traffic into different bandwidth classes. I can watch the bandwidth per ...
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2answers
50 views

How to setup failover with rabbitmq cluster with a loadbalancer like f5

I have been trying to find information on f5 developer central and internet regarding the following setup with no luck. We want to have a rabbitmq cluster with 3 nodes. 1 node will always be primary/...
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2answers
59 views

Linux block outgoing traffic to a specific ip without iptables

I basically need to run the following iptables -A OUTPUT -d 169.254.169.254 -j DROP except I cannot use iptables because the program is running in a docker container and I cannot use the --privileged ...
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1answer
19 views

Connecting two OpenVZ internal networks so containers can see each other

I have two OpenVZ Hosts with containers on them. This is the current layout: Host-A: (eth0 (connected to internet), eth1 (connected to Host-B)) Host-B: (eth0 (connected to internet), eth1 (connected ...
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0answers
35 views

Set firefox to use non default gateway [migrated]

I have 2 internet connections. One is set as default, so all traffic goes through it. Other have no default routes added, so no traffic goes through this internet connection by default. boby@hon-...
1
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1answer
56 views

Identify the ip to which an UDP port established connection

I'm trying to obtain the ip to which Rocketleague.exe has established connection on a UDP port. I've tried with netstat -p udp but for some strange reason it does not show any active udp connections . ...
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22 views

Client socket connection starts working only after being pinged by server?

I have a networked game I'm testing on a LAN. I'm using RakNet as my networking library. Generally everything works fine, but sometimes the client (an iPhone) seems to get "confused" when initiating ...
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0answers
27 views

How to prevent disconnection / reconnection attempts on private LANs without internet connectivity?

I am developing an appliance system which is meant to be transportable, used monthly in a different location, for ~100 simultaneous users, with laptops and tablets. The system includes a server (http,...
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2answers
47 views

How to use 2 IPs on one Apache server

I have two IPs (and domains) on my dedicated Linux server (Debian). I'm able to access the primary domain. But when I try to access the 2nd one, I'm directed to the primary site. In /etc/network/...
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1answer
43 views

Probable network issue despite healthy ping stat?

We faced a problem with a windows network where we suspect it to be a network issue although the ping works fine. System Overview: The Windows network is accessed from multiple sites connected ...
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0answers
26 views

Pinging (ICMP) Docker container on AWS ECS

I've got a script running in a Docker container that listens for ICMP packets. If you ping the container IP address, it picks them up and sends an email. However I'm having a bit of difficulty ...
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27 views

How to let chef listen on multiple IPs

I'm currently playing with chef to evaluate whether or not such a configuration tool might help us in our *nix-based environment. For the last few days I'm struggling with one problem I can't find a ...
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0answers
8 views

juniper netscreen-50 management access only when admin station interface in promiscous mode

I have just received a netscreen-50 Juniper and i am trying to configure it. On one interface, I have defined an IP address and an management access for telnet/ssh: set interface "ethernet1" zone "...
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34 views

Can we rely on docker virtual network isolation?

I'm building an architecture with docker. As everything is virtual I cannot see how to apply general concept like DMZ, firewalling and other network isolation method. When two containers are sharing ...
2
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0answers
28 views

How can one update BGP ASN on an Azure Virtual Network Gateway?

I have an existing Azure Virtual Network Gateway I'm attempting to reconfigure for use for BGP, per https://azure.microsoft.com/en-us/documentation/articles/vpn-gateway-bgp-resource-manager-ps/ . ...
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3answers
29 views

Have 2 different applications use 2 different ip's with the same port on the same host

I want to have an application running on x.x.x.x:80 and another one at y.y.y.y:80 on the same host. I have bought 2 ips from ovh and would like to know how to do so. I found these: Debian/OVH: How to ...
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3answers
69 views

Setting a static IP exactly as the dynamic IP yields loss of connection

Before I start I would like to point out that I do not want to get hung up on DNS issues with this question. EVEN IF DNS issues are apparent that would have nothing to do with basic IP traffic and ...