Tagged Questions

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

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0
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0answers
23 views

Elastic IP Not Resolving to Windows Instance

I'm sure I'm just missing a step, but I can't figure out how to get server to resolve to new elastic IP address. I appreciate everyone for their help. I've been trying to figure this out for a while ...
-2
votes
0answers
11 views

Access my own Virtualbox' services? [migrated]

Basic newbie question and I did search a bit. I have Windows 7, installed Virtualbox, installed Ubuntu 14.04 in it. It runs fine and I can sudo apt-get just fine. What I want it for is its LAMP ...
-1
votes
1answer
24 views

Interent Connection stop and reconnets intermittently, while ping requests go through [closed]

Good day all I will keep this short, for the past week my internet has started becoming jittery, It will work fine then suddenly it will "go off", how I know this is my google drive says cannot ...
0
votes
0answers
16 views

Data centre to data centre network performance compared to Users [closed]

I am creating a B2B web app/API as a product, which the client will connect their systems to directly. Light, but frequent payloads so latency is important. Is there any rough way to find out how the ...
2
votes
0answers
29 views

How to route traffic through different interfaces based on the port number?

iptables -A PREROUTING -i usb0 -t mangle -p tcp --dport 8080 -j MARK --set-mark 1 iptables -L Chain INPUT (policy ACCEPT) target prot opt source destination Chain ...
2
votes
2answers
59 views

Intermittent host and VM connectivity on ESXi standalone

I have a standalone ESXi 5.5.0 b2143827. It is running on a Dell R710 with 144GB of RAM. It has approximately 20 VM's on it. Right now, I cannot get onto the console via the VMWare vSphere client or ...
0
votes
0answers
26 views

discover BYOD on network powershell - basic [closed]

I am interested to learn how to discover/monitor network - on a windows domain. I have don researches but not much luck. I know that on my dchp list I can see all the devices that request IP addresses ...
0
votes
0answers
30 views

Can't reach shared folder from VM over VPN

My network knowledge is a bit lacking so I'm looking for some help on why we can't access a shared folder. We have a Windows 8 VM on a Mac host that is sharing a folder that we want accessible from ...
1
vote
1answer
68 views

Is there a netstat -s equivalent for windows?

I know that netstat -s exists on Windows, but it displays way less informations than on Linux/OS X. It only gives 8 counters about TCP, while on Linux it's more than 50. I'm looking for any ...
2
votes
1answer
53 views

DHCP reservations for a range of MAC addresses

Question Our DHCP server is set up to only give IP addresses to machines that it knows about (all IPs excluded, reservations for each MAC address). Part of the address range is used for virtual ...
-1
votes
3answers
52 views

Branch office Connectivity issues

We have two offices. One in The Netherlands and one in India. In each office we have pretty good internet connection (~20Mbps). The major problem we face is cross office connectivity. Skype calls ...
-1
votes
1answer
19 views

Why does ssh -f create multiple processes when a pipe is used? [closed]

When I on my Linux host do ssh -f 10.10.47.47 "/opt/omni/bin/mbuffer -4 -v 0 -q -I 8024 | /usr/sbin/zfs receive tank/test" then I see on the remote host 27349 ? S 0:00 bash -c ...
1
vote
1answer
37 views

Cisco Catalyst 3750 disable Factory default reset with Button press

The Catalyst 3750 Series switch has a front panel button which erases the config and reboots the switch if pressed more than 10 seconds. In a dense Rack it happened more than once to me that cables ...
1
vote
2answers
86 views

Centos 7 with 2 network interfaces on same network one of them doesn't respond to ping from outside

I have a centos7 just installed with 2 active interfaces on the same network like this ip addr show 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback ...
0
votes
0answers
17 views

debian openssh-server resetting connection [closed]

I've installed openssh server on my debian wheezy machine. I was able to access it without any issues from my windows laptop using mobaxterm personal (which provides a very decent unix like ...
1
vote
0answers
16 views

VM LAB - Promiscuous mode clarification

So for clarification I am running a Lab within VMware behind OpenVPN, 1 NIC with direct internet access (WAN vswitch) and another NIC with a leg inside a LAN vswitch. (This obviously houses my VM's ...
0
votes
2answers
48 views

Routing between 2 networks and 2 routers

I have a WatchGuard XTM33 and a Cisco ASA 5505, current network is running off of the Cisco and I want to eventually migrate over to the WatchGuard using new IP scheme. ASA 192.168.111.1/24 WG ...
0
votes
0answers
33 views

301 redirect DNS issues

I think I screwed up something in my DNS configuration and now its bugging me for hours. Any help would be greatly appreciated. I own a domain lets call it abc.com Before all the issues happened ...
0
votes
0answers
4 views

Execute CGI scripts on custom OMAP4 board as root [migrated]

I have a Ubuntu 12.04 Custom Board running Apache2. I have a web page which calls a CGI script which is responsible for starting and stopping ipsec service. I access the web page from another machine ...
0
votes
1answer
32 views

Can a faulty switch connected to the core switch block an entire network?

I encountered the following situation: The network I administer was blocked, and this was traced down to a specific rack, after I reseted both switches, everything worked. I supposed it was the core ...
0
votes
0answers
18 views

DD-WRT different IP settings for multiple SSIDs [closed]

Sorry for posting a noob question, but in case anyone is willing to help me, here goes: I have an ASUS RT-AC68U wifi router and I just installed the latest available version of DD-WRT: v24-sp2 build ...
0
votes
1answer
27 views

replace web traffic content with squid

I am using squid to block certain types of traffic to reduce band width, I have so far blocked adds, flash applications, video streaming and other such things. when a website or an advertisement ...
0
votes
2answers
84 views

OpenVPN Route Client Traffic Through VPN Server Tunnel

I have configured a vps following this tutorial, the server and client are successfully connected and can ping each other, server is at 10.8.0.1 and the connected client (android-OpenVPN Connect) get ...
-2
votes
1answer
63 views

With two NIC cards, in Linux (Debian), how do I keep the NICs from getting the same ip address? [closed]

I am using Debian 7 (wheezy). I have two physical NICs. I have used ifconfig and gnome-nettool to try and solve this. When I look at the device tool I see eth0 and eth1 (and the loopback). eth0 ...
-1
votes
0answers
12 views

Websocket issue on my system [closed]

I'm trying to test my simple websocket application as deployed here. it's working everywhere I tested except on my laptop and my account! After pressing open button the browser network shows that the ...
0
votes
2answers
51 views

Interconnecting a fiber optic switch with a copper switch

What would be the best way to connect from a "fiber optic only" switch to a regular copper rj45 switch? Which of the configurations shown in the attached diagram would work properly? Should I go for a ...
0
votes
1answer
76 views

Archive & analyse network logs from NetBSD on another machine

I want to use the the new NetBSD's NPF firewall on a gateway that also has the legal obligation to log the traffic for 1 year. To offload the gateway, I though to put the logging stuff (and IDS, quota ...
0
votes
1answer
52 views

Linux ping network namespace

I added namespace to my host-machine and made it available by using this: ip netns add h1 ip link add veth01 type veth peer name veth1 ip link set dev veth1 netns h1 ifconfig veth01 10.0.0.1/24 up ip ...
0
votes
0answers
16 views

Network connection from old application to SQL Server 2008 R2 lost once in a while

We are trying to migrate an Axapta 2.5 database from SQL Server 2000 to 2008 R2. We are testing performance etc. on the new server, but once in a while, these two events are thrown on the Axapta ...
0
votes
2answers
64 views

Name Server with Multiple IPs

We have multiple internet connections attached to my company's network, from different providers, and there are authoritative name servers on the network as well, also with an IP from each of those ...
-1
votes
1answer
30 views

Users unable to log on to network

A strange problem came up over the last few days. Some of our users had an issue logging on to the domain network. I had thought perhaps it had something to do with a command that was run using a ...
0
votes
2answers
42 views

Would UDP over VPN eliminate packet loss?

I am receiving a MPTS UDP stream from a remote location and I am experiencing packet loss. I would like to know if there's any way to eliminate this packet loss while still using the UDP protocol? I ...
1
vote
2answers
14 views

How can I redirect requests for a site in IIS to a different external server?

I am about to move my website away from IIS to a Linux VPS. Part of this involves updating zone records. There will be some time from when I change my zone records to when they are propagated to ...
0
votes
1answer
95 views

Adding static IPs on a p1p1 interface in ubuntu 14.04

I'm wondering if anyone can give me a rundown for networking configurations in ubuntu when the interfaces are p1p1 etc. I have tried p1p1:0 (like eth0:0) for secondary IPs to no avail. If someone ...
-3
votes
1answer
40 views

Where to optain my client key for SSL decryption? [closed]

example.pcap is a traffic capture I have made on my local Linux box of and now I would like to decrypt it. tshark -o "ssl.desegment_ssl_records: TRUE" -o "ssl.desegment_ssl_application_data: ...
2
votes
2answers
384 views

Docker containers can't resolve DNS on Ubuntu 14.04 Desktop Host

I'm running into a problem with my Docker containers on Ubuntu 14.04 LTS. Docker worked fine for two days, and then suddenly I lost all network connectivity inside my containers. The error output ...
1
vote
2answers
65 views

/etc/sysconfig/network is ignored on CENTOS7

I have a server with two NIC's. The default gateway has to be on a specific one, therefore I configured the GW via /etc/sysconfig/network. But obviousely, this is completely ignored by the ...
0
votes
0answers
29 views

packet is not being forwarded from tap interface to bridge

I am running fedora 19 on a virtual machine and have two tap interfaces (A, B) created. I'd like to be able to send packet from A to B. I am trying to do this using a bridge, however with the bridge ...
0
votes
0answers
14 views

Persistent promiscuous bridge interface

In an effort to try and clean up the office network I've mirrored the uplink port on our switch, plugged it into a spare port on our VM server, and set up an VM with ntop. All this works, however we ...
0
votes
1answer
23 views

ipaddress swap causes both machines to be unreachable

I got two virtual machines running on SLES11 SP3 in the same subnet for which I' d like to swap ip-addresses on the fly. I tried the following script (of course with both different ip parameters) on ...
0
votes
1answer
39 views

How many times does switch calculates FCS?

Does a switch calculate the Frame check sequence (FCS) before sending packets? Because packet shouldn't change, so FCS should also stay the same.
-1
votes
0answers
10 views

Direct each user's traffic out of a particular IP address - Ubuntu [duplicate]

I am setting up a multi-user Linux workstation to act as a terminal server. Users connect via Xming (x11 forwarding). Is it possible to map each user's traffic to a unique IP address. I could do it ...
0
votes
0answers
15 views

Configure Proxy Server

Here is what I want to do: I have a Java application that supports execution of any HTTP/HTTPS URL with or without proxy server. I could able to do it with HTTP and HTTPS. But I am getting stuck ...
9
votes
1answer
139 views

Windows DHCP server - distribute multiple default gateways?

I'm helping a client through the process of configuring a Windows 2012 DHCP server while migrating from Linux ISC DHCP. In the Windows New Scope Wizard dialog, there is an option to: ...specify ...
0
votes
1answer
22 views

How do I tell a headless Ubuntu 14.04 server how to access a shared drive that is on Windows domain and renew password for a Windows user?

Inside a corporate situation, the machines are largely controlled using Microsoft technology. I have another server on the same network that is running Ubuntu 14.04 headless. No GUI. I want to write ...
2
votes
1answer
38 views

Simplex, half-duplex, full-duplex (ccent1)

If simplex, half and full duplex are OSI layer 5 (session layer) modes, why are they configurable on a l2 switch?
0
votes
0answers
23 views

Benchmark network (internet) connection on server

I have a dedicated ubuntu server I rentet. Now I'm running a lot of ruby background processing on that server, that - among other things - does a lot of get requests to very small images (about 10kb) ...
-5
votes
0answers
29 views

Issues with the management VLAN

I have a switch with it's management interface (telnet,web) on 10.0.10.19. It has various vlans on it and all seems to be working but accessing the switch through this management vlan isn't always ...
0
votes
0answers
47 views

TCP ignores some packets for no reason

I have a weird problem which I can't understand. The actual network configuration is quite complex, because I am using Openstack and Docker to build a virtual network. However, the problem is not ...
1
vote
1answer
69 views

CentOS with multiple NIC and static route

I am trying to setup a CentOS with 3 NIC and static routes. eth0 has IP address 192.168.10.2 and GW:192.168.10.1, eth1 has IP address 192.168.20.2 and GW:192.168.20.1, eth2 has IP address ...