1
vote
1answer
29 views

Should my server ever need to directly communicate with the NAT gateway?

What I mean by ``directly communicate'' Does it ever need to receive packets with the gateway's IP address as the source IP address, or send packets with the gateway's IP address as the destination ...
2
votes
1answer
30 views

Disabling NetworkManager on RHEL 7

I was setting up a RHEL7 server in vmware vSphere and I'm having trouble getting it on the network without NetworkManager. I configured the server to have a static IP during the install process and it ...
2
votes
0answers
10 views

Connect internet camera and bridge/forward IP traffic

I have an Ubuntu (14.04) machine with two Ethernet cards. One Ethernet card (eth0) is connected to the office network. The machine is addressable from the outside Internet. I have a Web camera that ...
0
votes
0answers
18 views

Linux message: Possible SYN flooding on port 25. Sending cookies

I have a Linux CentOS server online. At my console this message appeared: possible possible SYN flooding on port 25. Sending cookies. See SYN flood and SYN cookies. I have done an Apache JMeter ...
1
vote
1answer
50 views

How to get Alfa awus036nha to work with Kali Linux?

Im running Kali linux 64bit 1.07 as a guest os through virtualbox 4.3.12 r93733. Ive also installed the VirtualBox 4.3.12 Oracle VM VirtualBox Extension Pack. I have bridged my hosts network ...
0
votes
2answers
41 views

RedHat Linux - ssh shows “connection refused” using one user and also root, but another user can connect

From server Y, user A tries to ssh to server X and gets Connection Refused. From server Y, user B tries to ssh to server X and is allowed through. From server Y, root tries to ssh and gets Connection ...
0
votes
0answers
23 views

ssh works on IP get “ssh_exchange_identification: Connection closed by remote host” on FQDN

I have a new raspberry pi box running at my home. I decided that I will use it to access it by ssh from the web. I setup the NAT in the Router and everything else, from my Mac Book within the internal ...
0
votes
1answer
23 views

How to spoof the MAC on a wifi, Linux Mint 17, with NM?

I can't find a reliable way to spoof my mac. If I use the "clone MAC address" on network manager (I use Linux Mint 17, Cinnamon), I can't connect to my wifi. I tried everything, unless I remove the ...
0
votes
1answer
22 views

Slow LAN connection on one machine but not another

I am using the same ethernet cable on two different machines and getting two incredibly different results. The following tests were done on a Windows 7 desktop and a Linux laptop. On my laptop, ...
0
votes
1answer
11 views

Software to provide loopback at remote endpoint, and client software to test performance

NOTE: I'm not looking at using the lo loopback network interface. We're developing an embedded device that has its own internal Ethernet network, and a second network that is exposed to the outside ...
0
votes
1answer
24 views

“Bad Password” Message in WICD-Curses

I've been trying to use WICD-curses to connect to my Wi-Fi network. I thought it would be simple: I went to the config page for my network, entered the password at the bottom, hit F10, and waited for ...
4
votes
3answers
64 views

Linux: How to get current bandwidth usage from command line?

I'm looking for a good way to get the current total bandwidth usage on a linux machine, i've tried iftop, nethogs, but they doesn't show real bandwidth usage (compared to system monitor), anyway they ...
0
votes
0answers
19 views

High-performance HTTP request sniffing in linux [on hold]

I have a VPN server that many users are connected to. I want to know which URLs are mostly accessed by the users. Therefore, I have to sniff HTTP requests that are transferred inside my VPN server. I ...
1
vote
1answer
33 views

Host is not able to ping Guest | Virtual Box

I am using LinuxMint17 (Host) and running another LinuxMint17 as Guest using Virtual Box. My Guest LinuxMint is able to ping Host LinuxMint but vice-versa is not happening. Network Setting in ...
0
votes
1answer
32 views

Need a way to use 2 networks to access the server in parallel sharing data traffic

I have a server connected to Internet via two networks - A microwave link and an ADSL Link. The server has been assigned static IP address in both network. Both both the networks are not reliable and ...
0
votes
0answers
9 views

Running Wine program through alternate network interface

Is there a way to configure Wine on Linux to use a different network interface on your system? I can't find anything about this except for other people's unanswered questions. The reason why I'd ...
0
votes
1answer
44 views

Seeing phone calls on my computer [closed]

I would like to setup my computer similar to how some TVs are set up, namely where when someone calls I get a small reminder in the corner with their number and caller id. This solution would have to ...
0
votes
1answer
44 views

Ethernet issues in Linux mint.

After a hardrive crash I installed mint 17 LTS with many attending woes related to lack of drivers (two of my 8 usb ports can actually recognize devices plugged into them). I'm currently attempting to ...
3
votes
1answer
36 views

Aggregating multiple internet connections into a single connection to allow improved throughput over a single connection

I have 2 or more internet access paths e.g.: 3G (2 Mb/s) Eth0 (20 Mb/s) Eth1 (separate network) (20Mb/s) I'd like to aggregate them like Speedify i.e. a single download could benefit from ...
0
votes
1answer
26 views

Local DNS queries fail on server but work on clients

I have Ubuntu 14.04 server and I have Bind9 installed on it and configured. On client computers I have the DNS server address set to this server. nslookup for my custom DNS entries return the correct ...
0
votes
1answer
14 views

What is the reason for an error 'eth0: Transmit timeout' in dmesg?

On a gentoo Linux system the dmesg output shows something like the following repeatedly: eth0: link up, 100Mbps, full-duplex, lpa 0x45E1 eth0: Transmit timeout, status 0c 0005 c07f media 10. eth0: ...
1
vote
1answer
23 views

How to capture tcp traffic between a virtual server and client?

Basically, my set up is: Kali Linux running in a virtual machine, Server running on a virtual machine, And my host machine as the client. What I want to do is mess about with some stuff on the ...
0
votes
0answers
8 views

Running two virtual servers cannot change network configration of second server

I am learning networking. The problem is that i am running two virtual machine of linux operating system on virtual machine whose server addresses are 192.168.1.100 and 192.168.1.200 respectively. I ...
0
votes
0answers
7 views

3G modem connect success, but minicom will block, how can i get in command mode?

minicom: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 OK AT+CGDCONT=1,"IP","3gnet" OK ATDT*99# CONNECT At this time minicom will block. But i want to get exec other command. how can i do it? my ...
0
votes
0answers
15 views

kernel upgrade causes ping to fail

I am facing some strange problem. I compiled the latest linux kernel and used "make localmodconfig" to create my .config file. In the new kernel "ping google.com" does not work. However the following ...
0
votes
1answer
93 views

Kali Linux not detecting wireless network in dual boot

Am new to Linux. Just downloaded and installed Kali Linux 1.0.7 yesterday. I have a wireless connection in the house. But Kali doesn't seem to be detecting the network. I go to the network icon and ...
1
vote
0answers
23 views

DNS Server won't work! [Bind 9 on Debian 7; Virtualized CT through Proxmox]

First I'd like to thank everyone in advance for helping me - communities like this are exactly what amatuers like myself need when faced with perplexing issues. I've recently begun virtualizing ...
0
votes
2answers
33 views

DNS server won't work! [Bind9 running on Debian 7; virtualized through Proxmox 3.1]

First I'd like to thank everyone in advance for helping me - communities like this are exactly what amatuers like myself need when faced with perplexing issues. I've recently begun virtualizing ...
0
votes
1answer
26 views

Redirect ports with iptables

I need to do redirect port 443 on all interfaces to 8080 on one interface using iptables on a box with 2 NICs. I also need to block pretty much anything else on those interfaces. Here is my iptables ...
-1
votes
2answers
90 views

Linux, Unable to get usb wifi drivers to work or compile

I've got a generic Ralink wireless usb dongle, and a fresh install of Linux Mint 17 (cinnamon). I'd like to be able to use the dongle to connect to my wifi, so that i can free up some cat5 cables i ...
0
votes
0answers
22 views

Can't connect to VirtualBox Ubuntu guest from Ubuntu host

I have an Ubuntu 12.04 virtual machine running inside VirtualBox and I recently switched it to a new host running Ubuntu 14.04. After the switch the guest can connect to the Internet, but no other ...
0
votes
0answers
26 views

Multipath tcp application-level performance measurement

I am working on a project related to Multipath tcp and I want to measure the goodput and the RTT at the application level. I don't want to use a traditional tool(netperf, iperf, ...) and I want to ...
0
votes
1answer
24 views

block network access to a domain (ubuntu)

I have a few ubuntu servers in various geographies. I want to block all outgoing connections from all ubuntu machines (all processes) to several domains, e.g. www.server.com. I know iptables can block ...
0
votes
1answer
7 views

Route request from 1VM to another

I have a linux ubuntu vm and windows xp vm running parallel. How would I go about routing a request from the xp vm to the linux vm? Host PC is setup to route test.com to 192.168.33.10 which is the ...
0
votes
3answers
30 views

outgoing ssh fails from only one machine on lan to outside network

I have multiple servers in my LAN (which I'll refer to as Box1), and they are all able to make outgoing SSH connections, except one that stopped recently, which I'll refer to as Box2 (actually, I'm ...
0
votes
1answer
35 views

SSH tunnel through two servers to access a web service on port 9091

what I have is a "phone-home" service running at remote1 that connects to LAN1 via: ssh -N -R 16864:localhost:22 <myuser.on.lan1>@<lan1.ip> so from the SSH terminal on LAN1 I can easily ...
2
votes
1answer
34 views

Why does using mtr speed up my download?

While updating php using homebrew I noticed that if I used mtr to ping the source of the file, the download speed would increase dramatically (on the order of 3 - 4 times faster). Why would this ...
0
votes
0answers
11 views

Smart transfer files to an isolated network environment

I'm working with a project that requires to provision a batch of files to machines frequently. But these deploy machines are located in an isolated network, which is ONLY accessible via a broker ...
0
votes
2answers
36 views

Wifi sharing over eth0

There are a lot of tutorials how to share network connection with your usb wifi adapter and I tried lots of them but it is still not working. Can you please help me with my problem. Here is my network ...
0
votes
0answers
14 views

Network disconnects after some time

Networking on my Xubuntu machine disconnects after some time while browsing the web. If I manually disconnect and reconnect, it works again. Here is the output of ifconfig -a: eth0 Link ...
0
votes
1answer
20 views

QEMU outside gateway

I've created two instances of CentOS6.5 (KVM) using Virtual Manager and I'm able to ping google.com, yahoo.com,etc... However the ip addresses for the instances are 192.168.0.* and the machine that ...
0
votes
0answers
35 views

Linux Mint Mate 16 cannot automatically connect to home Wi-fi

I have Linux Mint 16 32-bit installed with Mate desktop environment on LG-R590 notebook. The problem is although a lot of SSIDs are displayed when the network icon on the bottom right is clicked, the ...
0
votes
2answers
51 views

How to connect 2 SSH clients through a SSH server?

Hi I want to remotely administer (command line interface) a linux box from my home Windows PC. I have an ssh client on the linux box. I have an ssh client on my home Windows PC. I have a login on ...
0
votes
1answer
19 views

Cant connect to eth0 after wlan0 sharing with iptables

I wanted my Ubuntu server to act as a wifi hotspot. So I set up hostapd to allow wifi connections. I then setup dnsmasq to provide the DHCP settings. I then added the following iptables rules, so ...
0
votes
1answer
23 views

Only Allow Connection to Certain BSSID

There are two networks with the same SSID. I want to ensure I only connect to the access point and never connect to the other one. How can I allow AND prevent connection to wireless networks based on ...
79
votes
7answers
7k views

Is it possible to ping an address:port?

I am not into networking, and I have the following question related to the Linux ping command. Can I only ping an address? For example: miner@raspberrypi ~ $ ping onofri.org PING onofri.org ...
0
votes
0answers
10 views

sendmail for local network / home networking

All the sendmail configuration I found so far are either allow connections from local host (127.0.0.1) or anywhere (0.0.0.0). How to configure sendmail to allow connections from local network ...
1
vote
3answers
61 views

VLAN configuration

I'm trying to understand how VLAN works and how to configure VLAN in a switch and Linux box attached to it. Basically, I understood theoretically how a switch handles VLANs and trunking. Although, ...
-1
votes
0answers
46 views

Kali SYN Flood (Metasploit), not denying service

I have a server with apache2 installed. I tried to do a dos attack on the server by using kali linux syn flood attack, but i am still able to access the website on the server. use ...
0
votes
1answer
21 views

Reach ssh server behind a router on embedded system using established socket connection

I have developed an embedded application running linux to do remote I/O control. The application open a socket connection to my server to communicate, periodically, the state of the I/O and getting ...