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Questions tagged [networking]

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

0
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2answers
27 views

Subnet CIDR Scheme

I am redoing some VPC work that my predecessor did. I haven't setup a lot of networks, so I wanted to double check what I think makes sense isn't breaking some rule that I'm not familiar with. What ...
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0answers
16 views

MacOS Internet Sharing redirect traffic [on hold]

I configured Internet Sharing on MacOS Mojave 10.14 for having a hotspot where I can connect mobile devices to Internet. I need to redirect some traffic (all except that going to 104.155.107.127) ...
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0answers
23 views

How to make a executable / Server Proxy-Aware? [on hold]

While passing request through executable (sends request to server) from behind the proxy , the client machine is not able to make connection with Server that has public IP. how can i make the ...
-1
votes
0answers
31 views

What should be checked when network communication is not available?

I manage multiple agent servers that communicate with the main server. However, one agent server does not communicate with the main server. telnet <mainserver IP> <port> will not connect. ...
-1
votes
0answers
12 views

Can a server with HDD handle 1000 visitors online at same time (500kbps each) [duplicate]

i have a server and i host videos there. example i have 1000 visitors and they view video with 500Kbps at the same time so it means server should handle 500Mbps bandwidth but what about HDD , is that ...
-1
votes
1answer
15 views

Accessing Docker containers by their domain name

hey guys I have a docker container A with a domain name attached to it on a host B with a domain name attached to it as well.....how can I access the said container A via A's domain name rather than ...
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0answers
15 views

Networking Traffic Replay Simulation

I have ten physical workstations as part of an exercise connected to a switch, on the switch there is a network tap for traffic analysis. I want to replay captured TCP traffic between the machines ...
-1
votes
0answers
6 views

SSHing into a RasPi while an openVPN connection is active for all IPs not within the local 10.* network [on hold]

I would like to be able to SSH into my raspi; which I can do so over the wlan0 interface if it simplifies things. All other connections Id like to be routed through an openvpn connection at interface ...
-1
votes
0answers
14 views

How to add remote device as part of local network or vice versa? [on hold]

I have home network with 192.168.0.x and have Playstation 4 in this network. Want to connect to PS4 with Remote Play client from office network. There is one requirement from PS: It is possible to ...
1
vote
1answer
38 views

AWS flagged my subnet as invalid although it looks to be within the VPC CIDR block

My VPC CIDR block is 10.0.0.0/16 As I understand it, this should support 256 (effectively 254) subnets with 65534 hosts per subnet. When I tried to create one subnet 10.8.0.0/24 and associate it with ...
-1
votes
1answer
39 views

Changed from DHCP to static but cannot resolve name

I just installed a Debian 9.6 amd64 on a VirtualBox with NAT. I had to change the network settings from DHCP to static, so I followed a few articles and changed my /etc/network/interface for it to be ...
0
votes
1answer
18 views

Ip and secondary ip sometimes doesn't repond to ping

In order to have a virtual ip, I sometimes add another IP for my interface enp2s0f0 using # ifconfig enp2s0f0:1 192.168.201.33 up I also send a gratitus arp in order to publish the new ip of the ...
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votes
0answers
21 views

Public access to VMs in NAT mode VirtualBox

I am trying to make a vm publicly accessible and it seems I am missing something obvious. Since I do not have any control on the router, I choose NAT with port forwarding. Here are my rules: NIC 1: ...
0
votes
1answer
16 views

Access to the Docker containers

For example I have Host Machine HM (Mac OS). Inside HM I have installed Virtual Box that contains one virtual machine (boot2docker) VM1 (192.168.99.1 at my host interface). Inside VM1 I have docker's ...
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votes
0answers
22 views

How to create interfaces for CSR 1000v for GRE tunnels?

Well, my idea is to connect to 4 CSR 1000v routers in different VPC (without VPC peering). I've basically finished with everything with the pre-configuration creating VPCs, subnets IGW, modifying ...
1
vote
0answers
13 views

vCenter ghost network

I have 3 ESXi 6.5 hosts with the same network configuration: single Standard Switch with four networks with same naming on all hosts. This is what I see at ESXi web client. Inside vCenter I see ...
0
votes
1answer
9 views

Cannot run getent command remotely

On my CentOS 7 machine, I am running this command: pssh -h rephosts -i "/bin/getent hosts sync.$(hostname) | awk '{ print $1 }'" but I am only getting my host ip (where i am executing this command) ...
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votes
0answers
27 views

Pritunl OpenVPN External IP not Connecting via UDP but connects via TCP

I'm using OVH for my vpn, and decided to go with Pritunl because of it's nice web interface for the server. I choose OVH for DDOS Protection for Xbox and selling some spots for my friends. When i'm ...
-3
votes
0answers
14 views

The path of the file that contains the IP address in mac [migrated]

where can I find the file that contains the IP address of the DNS server that i use in my mac? I tried the folder /Network but there is nothing in it.
-1
votes
0answers
15 views

Windows Server 2016 Hyper-V Role connection fault [on hold]

I have a Hyper-V server (Win 2016) which has been set up and the V-Ethernet has been configured as an external network and allowed to share with management OS network. The vErthernet has a static IP ...
0
votes
0answers
26 views

Monitoring traffic by IP

I have machines with one interface eth0 with multiple different IP addresses attached to it (255) to be exact, interfaces look like this eth0:1, eth0:2 ...eth0:254. I want to monitor the traffic for ...
-1
votes
0answers
14 views

Virtual Box Bridged Adapter can't Ping Host < OR > Guest [migrated]

I have a windows 10 Host machine running Virtual Box 5.2.22 the IpAdress is 192.168.1.24 mask 255.255.255.0 (class c). I have a guest OS windows 10 with IP 192.168.1.252 mask 255.255.255.0 (class c). ...
0
votes
2answers
41 views

Can I connect to a network wirelessly via secondary router? [closed]

Server OS: Windows Server 2016 Essentials Client OS: Windows 10 Pro I have a laptop that I would like to wirelessly connect to a local network domain and access the server. The problem is the main ...
1
vote
1answer
34 views

Duplication of UDP traffic to two ports on localhost

I need to redirect incoming UDP traffic to two services listening different UDP ports on localhost. I tried: iptables -t nat -I PREROUTING -p udp -d 10.11.12.13 --dport 22 -j DNAT --to-destination ...
1
vote
0answers
19 views

Network Status Down after HyperV to Azure Failover

I was hoping someone could help. I've setup a recovery services vault protecting a HyperV site. Everything seems to be working as expecting in terms of replication, but when performing a failover ...
2
votes
1answer
63 views

How to do routing between the instances in AWS using Route Table?

I have built the following model below. There are 4 instances which have CSR 1000v router deployed in 4 created subnets (green CIDR) that have 28 as a mask. I have created other subnets in order to ...
0
votes
0answers
30 views

Cisco acces list rate limited or missied packet

I'm facing the same problem as "George Bailey" was asked the question earlier and "Vatine" have the answer. But as per the advise I don't gate the solution. Though I've configured "SW2(config)#...
0
votes
1answer
53 views

Intermittent http connection failure

We have two servers, ie host1.example.com host2.example.com One of these acts as the primary web server for our two main websites, example.com and example2.com. The other acts as a backup, which we ...
0
votes
2answers
77 views

Linux Two network adapters with static IP addresses on GCE Linux instance

I want to make a VM hosted on Google Compute Engine to have 2 static IP addresses. For the purpose I created the VM having two network adapters (NICs) each of them allowing me to "pick" 1 static IP ...
0
votes
2answers
29 views

global http proxy for a container

In my docker container there are some applications that make http(s) requests. How can I configure the container so that all these requests go through an external http proxy? Docker docs suggest ...
0
votes
1answer
36 views

VLAN ID conflict

I have two devices not managed by myself (let's call them A and B) that should be directly connected, but due to cabling reasons they have to go over at least 2 switches used by my internal network. ...
0
votes
1answer
63 views

IP/Packets Forwarding [closed]

I have searched a lot about IP + Packets forwarding but there was not enough information to find. Is forwarding only used in case of Virtual Private Networking or it has also other uses? if yes, when ...
0
votes
1answer
51 views

Round-robin outgoing TCP requests between multiple Ethernet adapters on Windows

I have a Windows Server Standard with 3 Ethernet adapters. I am running a C# application that makes TCP connections to another server. Right now they are all made via the adapter that has a default ...
0
votes
1answer
57 views

Received empty response from Zabbix Agent at [X.X.X.X]. Assuming that agent dropped connection because of access permissions

I have a Zabbix configuration problem here in the company a few days ago. I'm having this error on the hosts page in the Settings portion. I have already done several tests, being: Agent and Server ...
0
votes
0answers
26 views

Use secondary IP as outgoing IP on SOCKS5 traffic that uses this IP

I have a server that runs OpenVPN on it's primary IP. There is also a second IP I connect to using SSH as a SOCKS5 setup like this: ssh -C2qTnN -D 1337 me@<secondary-ip> I go to whatismyip....
5
votes
0answers
61 views

How can I make ethernet take precedence over wifi on Ubuntu 18.04?

Goal Let ethernet take precedence over wireless when ethernet cable is plugged in Method After having done a fair amount of Googling and reading I've come to a point where I believe what I should ...
0
votes
1answer
35 views

How to make an internal load balancer in a google cloud kubernetes instance be accessible from another kubernetes instance in different regions?

I am trying to expose a service inside of a Kubernetes cluster in one Google Cloud Region (us-east) and have it accessible to another Kubernetes cluster in a different region (us-central). I would ...
0
votes
1answer
31 views

How to prevent a Port from being used while a service restart

I'm using Ubuntu 16.04 servers. Each server hosts multiple services. Sometimes, when a service is restarted, it fails to bind to the port and says that the port is already in used. Indeed, some ...
0
votes
0answers
22 views

How can I see a tcp sessions properties (congestion window size, current slow start threshold value, etc.) on Windows?

On linux you can run ss -i dst 10.0.0.1 and get the following: Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port tcp ESTAB 0 0 10.172.44.11:46525 ...
2
votes
1answer
45 views

Trying to get Windows 8.1 Remte Desktop to work on a newly cleaned laptop

I have two laptops both Windows 8.1. One of which I am trying to setup now as it has just been factory reset after getting too much rubbish on it. I am trying to remote desktop into a server in ...
2
votes
1answer
15 views

ESXi vDS multiple LAG

Currently network design is 2 Switches and each ESXi host has 4 NICs. 2 NICs are connected to Switch #1 and 2 NICs are connected to Switch #2. As this are different Switches it’s not possible to ...
0
votes
1answer
58 views

How to forward packets at TCP level by using iptables?

Suppose I have two local machines A and B(Ubuntu), and there is also a remote server C. Originally, through RESTful API, I can call GET https://domain_of_C/resources directly from machine A to get ...
1
vote
0answers
40 views

Transparent LAN service on Linux

I need to implement a VLAN based transparent LAN service on Linux. Meaning I need to take configured VLAN and forward it directly to the specified port (all broadcast/multicast and unicast packets). ...
12
votes
4answers
1k views

Could a name server resolve IP addresses dynamically based on some strategy?

We have registered some name servers for DNS resolving for our website which is deployed in several data centers. Our current strategy of DNS resolve is that based on the different client IP ...
-5
votes
2answers
40 views

Router's Parental Controls Really Block All Internet Traffics?

I am using Asus 4G-AC53U router. When I turn ON "Parental Controls" to block a client's Internet access, does the router really block ALL kinds of Internet traffics including system's service (such as ...
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votes
0answers
36 views

Cannot ping my routers after interfaces configuration

I would like to make the following topology. , R1 / \ R2 R3 \ / R4 Where R1, R2, R3, and R4 are Cisco CSR 1000V routers. R1 IP-address = 3.16.176.197 Interface IP-...
0
votes
1answer
62 views

Run tshark in google cloud with external ( public ) IP

I had tried to run tshark in a centos 7 instance hosted in google cloud platform. When we analyze the captured packets, it is only showing the internal IP of that server. Is there any way to get the ...
0
votes
0answers
25 views

API from internal network does not resolve from AWS Virtual Machine

I am struggling to connect and resolve an API URL on our DMZ Server The network diagram is found below https://imgur.com/qHhwUgK whats done so far My website is hosted on AWS AWS can connect to DMZ ...
0
votes
1answer
42 views

OpenVPN Client Shared Network Routes

Currently our OpenVPN Community Edition server (version 2.3.11 running on RHEL) client config files are stored in /etc/openvpn/ccd. We want to control which network routes each user gets depending on ...
0
votes
0answers
38 views

AWS EKS CNI Creating Duplicate Network Interfaces Causing Outages

I'm running an EKS cluster on AWS and I've been having periodic outages recently. I tracked down the issue to duplicate network interfaces on one of my nodes, which I believe are created by the AWS ...