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

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37 views

Linux based security for companies - how much do you do? [on hold]

So if your company is mostly Unix/Linux based on the server side (but mostly Windows on the client side), how do you go about securing the network and all workstations? I assume that you have a ...
1
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0answers
13 views

2 IP cameras with same configuration but different behaviour

I have a Vodafone Station router, and 2 IP cameras connected to it through an Ethernet cable. Both have the same configuration. Both DHCP enabled, one has IP 192.168.1.10 with port 81 and the other ...
5
votes
3answers
1k views

How do I make a connection private on Windows Server 2012 R2

After a restart of one of our servers (a Windows Server 2012 R2), all private connections become public and vice versa (this user had the same problem). Stuff like pinging and iSCSI stopped working, ...
3
votes
1answer
77 views

How do I enforce preferential routes with BGP & Quagga?

I have two routers that I'm setting up currently and they will be feeding my network of servers with a private AS number provided by the datacentre. What I want to do is provide both a VRRP failover ...
2
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0answers
13 views

Breakdown Windows Network IO by network adapter and by process

What I'm trying to do is breakdown the Network IO by network adapter and by Process. The goal is to identify which processes are generating the most IO on a certain network adapter. Resource Monitor ...
0
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2answers
209 views

packet loss between two specific VMs

I am experiencing some high-percentage packet loss (more than 70%) between two specific VMs in a local network, in a remote cluster (I have no physical access to it). One machine is used as a hadoop ...
0
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0answers
20 views

Server-Client Architecture Suggestion [on hold]

Scenario : We rent a room space for our office at an IT Park in which there are 15 cubicles and each cubicle has individual port from which Lan and internet will work through. our local server will be ...
1
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0answers
12 views

How do force ixgbe to pass all packet ? Not good packets only? [on hold]

I m running freebsd 10.0 with ixgbe driver . But there is difference between total rec packets and good packets. dev.ix.1.mac_stats.total_pkts_rcvd: 699587190 dev.ix.1.mac_stats.good_pkts_rcvd: ...
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0answers
13 views

What is the meaning of off-ramp and on-ramp [on hold]

Title pretty well describes the question I can not find a proper definition for both the terms on-ramp off-ramp in networking world , cisco particularly Can someone please explain to me what they ...
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0answers
14 views

Configuring Home network

I have a tmobile dual band router and tp link Wr841n would like to know the best set up so I can use one as an extender with out sacrificing to much performance
0
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1answer
720 views

Is there any difference between CIDR & VLSM? [duplicate]

As I understand it, the terms Classless Inter-Domain Routing (CIDR) and Variable-Length Subnet Masking (VLSM) effectively refer to the same thing. Is there any noteworthy difference between the ...
0
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1answer
19 views

Linux PCs sending “ICMP udp port unreachable” to DNS server

So digging around in my syslog I have been noticing a lot of ICMP packets being flagged by our ASAs: %ASA-4-313005: No matching connection for ICMP error message: icmp src Internet:x.x.21.122 dst ...
0
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0answers
21 views

How to raise max no of file descriptors for daemons running on Debian Jessie?

I'm playing with pgBouncer as a connection pooling system for PostgreSQL. My system is a 12-core with 64GB RAM and 1Gbps network interface running Debian 8.1. Now I want to raise the limit for open ...
0
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0answers
16 views

On debian, removing one virtual interface eth0:0 removes other virtual interfaces. Why?

Tried searching for the answer a lot of times. I have two virtual interfaces eth0:0(10.0.0.1) and eth0:1(10.0.0.2). I am trying to remove only eth0:0 interface. If I execute the command "ifconfig ...
0
votes
0answers
12 views

Cannot access File Server from one workstation but can from another with same credential

I have Small Business network with one file server and 25 workstations in workgroup. Lately I've been experiencing some difficulties. Latest: one of the user cannot sign in into network share on the ...
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0answers
15 views

compTIA A+ 2009 objective vs 2012? [on hold]

*What is the difference between the aforementioned training/certificates , and can I study the 2009 one and follow it with the differences ,or do I have to take a course aimed at the 2012 one ?
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0answers
10 views

Network IO throttling in cgroups

cgroups allow the user to manage the resource usages of processes or groups of processes. Block IO throttling is supported and works well. Why is it however that network IO throttling (specifying hard ...
2
votes
1answer
26 views

Making changes to default IPv6 route persistent in CentOS 7

I have several IPv6 addresses on a CentOS 7 server and need to make a specific v6 address the default address used in routing. I have been able to do this by modifying the route table. ip -6 route ...
0
votes
1answer
18 views

VMware systems not working on SRW2048 swtich

I received an old Linksys SRW2048 gigabit switch and have used a straight-through serial cable and the console port to reset the flash config back to defaults so that it is configurable for our ...
-1
votes
1answer
29 views

Webserver in VPN needs IP of clients in another subnet [on hold]

I have a router connected to a VPN server at 172.16.1.1 and would like the clients connected to that router to access a webserver in that VPN, say 172.16.1.2. I need however for the webserver at ...
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votes
0answers
24 views

Can't connect to the mapped drive in the server [on hold]

I'm using windows 2012 server and the client is windows xp. There is no user in the server who is in the client, so I used the user in the server who has the authority over the server with password ...
2
votes
1answer
37 views

pfSense can't access https website

I have just installed pfSense on a PC Engines APU1D4 to evaluate as an alternative to a Soekris 5501 + OpenBSD based setup, I have a PPPoE WAN configuration. The pf rules, NAT and PPPoE ...
1
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0answers
10 views

Are the i40e and ixgbe drivers really used by our Intel NICs?

We recently got two QCT 2U4Node high-density servers. Each node is equipped with a XL710 dual 40G NIC with two QSPF+ ports and two QCT mezz cards that sport Intel 82599 and dual 10G SPF+ ports for a ...
1
vote
1answer
548 views

Creating a multi-wan/isp failover router where wan IPs are dynamic on Debian

I'm having an incredibly hard time creating a basic router on Debian which has connections to two ISPs where the ip addresses are dynamic. I don't need bonding, I really just need some way to detect ...
1
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1answer
3k views

How do I connect two Cisco Catalyst 2950 over LAN?

I'm trying to connect (2) Cisco Catalyst 2950's over each's respective FastEthernet 0/1 ports, but for some reason, they're not communicating. I'm doing this to physically extend my network and add ...
10
votes
3answers
835 views

NetBIOS “free” network?

I was wondering if someone here has had an enterprise experience running a "NetBIOS-free" network. I have in mind a mid to big Windows-based network. I found some good posts here, here and here. I ...
0
votes
0answers
10 views

Does a SIP trunk relay the RTP stream or just set up the call?

Suppose I have a SIP PBX like Asterisk and a bunch of phones registered to it, and outgoing/incoming calls are handled through a SIP trunk. Do the RTP streams go directly between the phones and the ...
13
votes
5answers
24k views

Is there a way to get wireshark to capture packets sent from/to localhost on Windows?

Is there a way to get wireshark to capture packets sent from/to localhost? When I monitor traffic going from my computer to another, or from another computer to my computer, then it works. But ...
-2
votes
1answer
49 views

Can't Bind IP Address To Machine [on hold]

I have the following IPs but I can't bind them to my machine I am getting errors. Here are the IPs I own. 2607:5300:60:1234::/64 - Came with server 158.69.123.123/29 - ...
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votes
1answer
16 views

Inconsistent ping to my ISP backbone [on hold]

this is a traceroute from My ISP to the same ISP backbone located in another city from my country here (500miles aprox) : http://i.stack.imgur.com/BbQjm.png Does this idicate a traceroute problem? ...
0
votes
0answers
28 views

Database connection time out intermittently between Azure web role and Sql server in Azure VM

I have an Azure cloud service web application with a web role with two instances. The database is being hosted in a virtual machine in Azure in the same data center (Amsterdam). I have end-point ...
2
votes
1answer
53 views

What are the network prerequisites for Windows Azure Pack

I have followed many articles to install and config windows azure pack distributed, But every time I finish configuring everything, the azure pack is not working and give me different errors, seams to ...
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votes
1answer
28 views

Linux DDOS Protection / Gateway without NAT

I need help to configure a box for DDOS protection and provide external ip addresses to "internal" (which aren't really internal) servers. I have 32 IP addresses from my ISP. I want to configure a ...
0
votes
2answers
39 views

How to log all inbound connections on Windows server

I need to log a summary of all inbound TCP connections on a Windows 2008R2 server, but only including the Source IP, Source Port, Destination IP and Destination Port. I do not want to log the payload ...
-1
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0answers
35 views

Understanding /proc/net/dev

In a Linux container I ran firefox and downloaded a large file. To my surprise after inspecting /proc/net/dev Interface| Receive | ...
0
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0answers
2 views

Can't connect to socket listening on 127.0.0.1 but works for 'localhost' [migrated]

I have a clean install of Windows 10 Pro x64 and I'm trying to run postgresql server on it. It used to work perfectly on Windows 7, but Win10 is behaving really weird: if I configure postgres to ...
37
votes
8answers
11k views

Windows TCP Window Scaling Hitting plateau too early

Scenario: We have a number of Windows clients regularly uploading large files (FTP/SVN/HTTP PUT/SCP) to Linux servers that are ~100-160ms away. We have 1Gbit/s synchronous bandwidth at the office and ...
0
votes
1answer
17 views

Issue with bind_ip on mongodb mon Virtualbox

I have been struggling with mongo bind IP for a while , I think this is the time to shout for help. I am using hostonly network 192.168.56.0/24 . I have 4 boxes. 3 boxes for mongo ...
0
votes
1answer
25 views

Need to download Outlook files from webmail, no Outlook synchronization available

We recently moved our DNS from GoDaddy to our own internal server, which implies all the necessary DNS records have also changed. We had an IT guy backup all Outlook files before we changed DNS hosts ...
2
votes
4answers
2k views

Is it possible to run two services on the same ports with different IP but on the same machine?

My question is simple. Is it possible to run TWO different game servers using exact same port but on different IP's using same network interface on the same server ? Does each IP adress have it's ...
0
votes
2answers
1k views

Mismatch between IP address and MAC Address

Suppose you have two interfaces in the host belonging to the same subnet connected to a normal L2/L3 switch port which has a single vlan with interface IP 10.0.0.1. nxge0 (10.0.0.201) ...
0
votes
0answers
18 views

Server is using MAC address of eth1 when connecting to eth0?

I have a server with 10.10.1.1 on eth0 and 10.10.2.1 on eth1. The routing table has 10.10.1.254 as it's default gateway. There's a freenas box on 10.10.1.200 which keeps reporting that 10.10.1.1 has ...
0
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0answers
24 views

Bridge server for connecting two databases?

I'm in a bit of a pickle. I currently have 2 database servers. One is hosted in the US and is online on the internet. The other is local, working only on LAN and external connections are not allowed. ...
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0answers
12 views

Accessing remote application from a network VIA VLAN

I have a VLAN network (target network), where I'll connect to a remote system from my network and take remote desktop and work. So my machine is connected to the target network through VLAN. My ...
2
votes
1answer
3k views

Watchguard config, drop-in or mixed-routing mode?

I have a Watchguard XTM 2 that is currently acting as a firewall and a router for my business network, I currently have the WG setup in mixed-routing mode and am happy with the current configuration. ...
0
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0answers
30 views

Debian Openvpn port closed

Newbie in linux! there is already similar questions are asked here, but the solutions are not working for me. can somebody help me with this issue: I have been installed openvpn server on debian 8.1 ...
161
votes
13answers
27k views

Why couldn't MAC addresses be used instead of IPv4|6 for networking? [closed]

I am reading up on TCP/IP and other related protocols and technologies. MAC addresses are described as being (reasonably :) unique, and as having a large possibility space (several hundred trillions), ...
0
votes
0answers
11 views

Redirect destination or rewrite destination in shorewall

My shorewall firewall running on debian nicely. I have 2 server outside from my network. All my client access server A some reason i want client access to server B without changeing ip address or dns ...
1
vote
1answer
237 views

Limit/Throttle per user OpenVPN bandwidth using TC

I have a group of users connecting to my server via OpenVPN TCP and UDP (2 services). The two services are operating on tun0 and tun1 I'd like to be able to limit each user's bandwidth to say 5mb/s ...
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0answers
71 views

Application Crash after inactivity Application Event ID: 1026, 1000, 1005, 1001. Security Event ID: 5061

For several months now I have a problem with my 3rd party application. After some inactivity on application, application crash. What I checked: Network. Updates (without servers, on PC and server ...