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2
votes
1answer
35 views

Is there a better way than VPN tunnels to access local tools in remote DCs?

I have created a fancy interface which pretends to be an unified interface to access to different local tools located inside different datacenters. These tools are not accesible from the outside. To ...
3
votes
2answers
349 views

When do browsers request and use IPv6 DNS records?

I'm glad my new Linode hosted server offers an IPv4 and an IPv6 address as well. And default DNS records, when using Linode as NS, shows both A and AAAA records example.com 86400 IN A 203.0.113.4 ...
0
votes
0answers
41 views

Intermittent telnet connection issues on 1433

I have several windows server boxes running on the same subnet at a co-lo. I have a few sql servers instances running and some of the machines can talk to it just fine, but at least two of my web ...
1
vote
0answers
57 views

Wifi between Buildings 385ft Apart [closed]

I administer a network where they've built a new building on the property that is 385ft from the main building. The ground between the buildings is completely paved and the owner wants to avoid a ...
1
vote
2answers
90 views

Switch won't enable ports connected to network printers

I recenlty set up two different switches in two different locations and had similar problems with both of them when it comes to connecting a network printer. Switches: Switch 1: Netgear GS724T 24 ...
0
votes
1answer
37 views

can't connect to ec2 from some networks

My EC2 instance does not answer pings or requests from a certain network, while it does answer pings from other ones. This causes my webapp to crash for that network. The particular network where it's ...
1
vote
0answers
175 views

SQL server intermittent connectivity issue every 4 or 5 days

I have a .net web application that calls sql server 2008 running on a different server. From last couple of weeks, after every 4 or 5 days, web applications connectivity to sql server becomes an ...
-1
votes
4answers
65 views

Can you traverse Site-to-Site VPNs

For example: Router A <-> Site-To-Site VPN <-> Router B <-> Site-to-Site VPN <-> Router C If static routes were put in place so that: Router A doesn't know about Router C ...
0
votes
2answers
283 views

Connecting VoIP Phones to a Laptop

I'm trying to connect two VoIP phones to a laptop using the internal ethernet adapter and a usb-to-ethernet adapter. My configurations are as follows: Laptop eth0 - 121.1.2.1/24 Gateway - 121.1.2.4 ...
0
votes
2answers
186 views

Connection timeouts when connecting to localhost / 127.0.0.1

I have a Debian Squeeze dedicated server which hosts 4 front-end websites, and several back-office tools and APIs (which feed into the main websites). This has all been up and running since 2008 ...
0
votes
1answer
67 views

Traceroute to single IP from 2 different networks (one pass, another - fails)

traceroute from 2 different environments is giving different results. One is passed succesfully, the other one failed. I don't believe that would be our own switch/router - otherwise I would not be ...
0
votes
0answers
95 views

aws high latency in same VPC Zone

We are facing the connectivity latency issues between the instances. I have calculated the connection time between the two instances in the same VPC using the command time trace-route. Sometime the ...
0
votes
2answers
205 views

Point to Point Connection Between Two Hosts

I am trying to set up a point to point connection between two Linux host machines. I've connected both of them with crossover cable, but they can't ping each other. Here are the configurations for ...
0
votes
1answer
59 views

Unable to connect to SQL Server over Azure Point-to-site VPN

I'm having trouble connecting to SQL servers over an Azure point-to-site VPN. SQL Standard is running on an Azure VM which is part of an Azure point-to-site VPN. It is a named instance. SQL Express ...
0
votes
0answers
22 views

Server 2008 - External Connection Timeout for Web Application

I'm trying to trouble a connectivity issue with a web application running on Server 2008 and IIS. When trying to connect through the local IP there is no problem. However when trying to connect to the ...
0
votes
1answer
51 views

What packet to ignore to not have ssh terminated on brief connectivity loss?

It seems like sometimes there are some connectivity problems around the edge of our network to certain other networks, and my ssh sessions with some remote servers, which themselves have no ...
0
votes
0answers
141 views

Windows Server 2008 R2, weird intermittent outgoing connection issues, & Hyper-V Virtual Network

My provider says that they run an 'unfiltered' network, so it's not a network issue. Not entirely convinced...but they aren't being very helpful. Basically two days ago started having issues with ...
0
votes
0answers
26 views

Web server down in some places in the world for short time

Hello I have a Windows Server 2008 VPS, located in USA with a Web Site (IIS7) that publish contents to Mexico and Argentina. Sometimes I lose connectivity for short period of time (about 5 minutes), ...
1
vote
0answers
426 views

Losing connection to SQL Server on the same machine?

I've installed our SQL Server driven software on a client's computer. This consists of SQL Server 2008 R2 Express, and using ADO/SQLOLEDB drivers on a brand new Windows 8 64bit machine. The problem ...
-1
votes
3answers
748 views

Script to log internet connectivity outage [closed]

What is the best approach to setting up a script to monitor and report a server's connection to the Internet? I'm not referring to connection to the local network, but rather a server's (or the whole ...
0
votes
1answer
184 views

Client Router Causing Wireless Bridge Connectivity Issues [closed]

I have an issue that I can't seem to figure out on my own. Whenever I power on a client router, it causes connectivity issues with another router, which functions as a wireless bridge. The ...
0
votes
0answers
18 views

Acceptable time interval before attempting to reset a connection?

I am writing an application for a router which simply connects it to a VPN. If for some reason the connection fails, the application will attempt to acquire a new socket and reset the connection. My ...
0
votes
0answers
51 views

Unable to login into CISCO SAN switch management IP

when i try logging into the switch through device manager it throws the below error: "busy network,no rout,snmpd unresponsive" The physical connections between the san switch and the network switch ...
-2
votes
1answer
310 views

Test A SSH Connection from Windows commandline [closed]

I am looking for a way to test if a SSH server is available from a Windows host. I found this one-liner, but it requires the a Unix/Linux host: ssh -q -o "BatchMode=yes" user@host "echo 2>&1" ...
0
votes
0answers
438 views

Losing internet connectivity on server after installing LogMeIn Hamachi (with server set as gateway node)

Our domain controller (SBS 2003) completely lost internet and network connectivity yesterday after I remotely installed LogMeIn Hamachi on it and set it to be a gateway node- in an attempt to create a ...
0
votes
1answer
72 views

LDAP URL example: is it possible / correct to use only the domain without the hostname?

We have an application which connects to an Active Directory (MS) using LDAP protocol. We give usually the following parameters: ldapUrl = ldap://myserver.mydomain.ext:389 ldapBaseDn = ...
0
votes
4answers
465 views

Monitoring the stability of an internet connection

I relatively recently signed up with a new ISP and I have about 2 weeks to determine if their uptime is sufficient for running a server. My initial plan was to install Nagios on an old laptop and ...
1
vote
1answer
814 views

Cannot connect to Openstack Instance via horizon, but SSH works?

I've got an OpenStack deployment running inside a VM for testing purposes. My setup is as follows: Host Ubuntu x64 with Virtualbox -> Guest Ubuntu x64 with OpenStack -> Ubuntu X64 Server Test ...
0
votes
1answer
313 views

504 bad gateway with Nginx

I have a J2EE application hosted on a linux VPS server. I use nginx as the web server and tomcat6 as the application server. At times, the website keeps waiting to load or sometimes even throws a 504 ...
0
votes
3answers
62 views

One PC in the network lose ability to browse websites

Only one of the users in the network has this problem: at random times during the day, the user is unable to visit ANY websites. He still has access to Network drives. When pinging for Google or ...
4
votes
1answer
285 views

Two HP iLOs have gone unresponsive, and are in a colo. Is there any way to remotely troubleshoot?

We have two DL360 G5s that suddenly lost iLO connectivity. They are at a remote site, so I cannot do any physical troubleshooting (yet). Is there any way I can remotely troubleshoot the iLO? Currently ...
0
votes
3answers
79 views

How to find best datacenter in China? [closed]

I guess this question would be applicable for most countries but in this case, more specifically: if you do not speak Chinese how to find top tier data centers in China?
0
votes
2answers
537 views

what does “eth0: link up” mean? /var/log/messages

My server is being attacked (SYN flood attack) and what I see in /var/log/messages is a ton of: r8169: eth0: link up r8169: eth0: link up r8169: eth0: link up 1. What does this mean? I can't ...
1
vote
1answer
398 views

How to diagnose intermittent connectivity issues

At work we are suffering some intermittent faults with the internet. This manifests itself as none of our desktop computers being able to make any requests externally including to ip addresses for a ...
0
votes
1answer
110 views

Enabling one interface breaks connectivity on another

I got a server with 2 NIC's. One is the external interface, that has a public IP. When only that interface is up, I can ping it fine from our internal network. When I enable the second interface ...
-1
votes
2answers
204 views

How does a webserver handle a connection lost? [closed]

How does a web server handle a lost connection, for example the client sends a request and due to some problem got disconnected from the server before the latter could reply with a response, what does ...
0
votes
1answer
535 views

Cannot access Tomcat application remotely, but can access Apache applications

I am installing Atlassian's Confluence 4.2 on a clean Ubuntu 12.04 server. Confluence runs on Tomcat 6, and uses PostgreSQL 9.1 as its datastore. I've installed and configured phpPgAdmin to manage ...
6
votes
4answers
14k views

Testing UDP port connectivity

I am trying to test whether I can get to a particular port on a remote server (both of which I have access to) through UDP. Both servers are internet facing. I am using netcat to have a certain port ...
1
vote
1answer
3k views

Exchange 2003 Intermittent Active Sync Connectivity

Our environment is Active Directory 2003, Exchange 2003, with a mix of 2003, 2008 R2 servers. The only thing from the exchange side that does not work is Active-Sync with mobile phones. OWA is ...
8
votes
1answer
380 views

Why do a few of my customers lose HTTP connectivity for brief periods?

I am running IIS 7.5 on Server 2008 R2 virtualized on a Windows Core 2008 R2 server on Intel server hardware sitting behind a Sonicwall firewall. For a number of months now, we've had a trickle of ...
0
votes
1answer
401 views

How to fix googlebot Server Connectivity

I get 'Server Connectivity' error at google webmaster tool. I suspect it is because of iptables rules that I've set to counter some DDoS attacks, thugh I'm not sure which rules could be relevant. This ...
2
votes
2answers
222 views

What are the steps to set up a Hyper-V solution with one NIC

I have successfully installed centos on a virtual machine via Hyper-V on Windows Server 2008 R2. This server has one NIC. I have created a virtual NIC, and virtual subnet, and within the virtual ...
1
vote
3answers
4k views

SQL 2008 R2 Named Instance Client Connectivity Issues?

We're upgrading our software from using SQL 2000 to 2008 R2. Our customers will be installing an update which uninstalls 2000 and installs 2008 R2 under the same instance. So if no instance existed, ...
8
votes
4answers
2k views

Multi-WAN bonding across different media

I've recently been thinking again about a product that Viprinet provide, basically they've got a pair of routers, one that lives in a datacentre, Their VPN Multichannel Hub and the on-site hardware, ...
0
votes
1answer
56 views

Network connectivity issue

I am a novice cisco user and I am trying to investigate as to why one of our connections went down. We have a fiber network ring that is operating just fine. Connected to this ring via ethernet, is ...
0
votes
1answer
310 views

ARP Connectivity on cisco small LAN

I feel so lame to have this doubt, so there is the question : Why do I not have connectivity ? The case is simple, I have configured the topology and have connectivity between each PC and respective ...
1
vote
4answers
3k views

Error Connection to SQL Server using [HOSTNAME]\instance or [FQDN]\Instance, [IP]\instance working

This one's kind of weird, at least to me. I've got MSSQL server 2k5 (STD) installed on Server 2k3 R2 SP2 (on account of some legacy software that doesn't yet support x64 or Server 2008), using ...
2
votes
1answer
81 views

Are there any other causes of this error that are NOT related to initial setup?

I'm trying to diagnose an issue at a customer site. They are receiving the following error: A network-related or instance-specific error occurred while establishing a connection to SQL Server ...
3
votes
1answer
173 views

IPv4 is almost out in Asia-Pacific, what are people doing about it? [closed]

Asians and those in North America are going to be separated on the internet if ISPs / telecoms don't do something. European progress to IPv6 is taking place much faster than in North America. What ...
0
votes
1answer
443 views

Connectivity restored with `ping`?

My server is operating properly. Something happens... Suddenly, my server is inaccesible via ssh and http. (The only open ports in the firewall.) All eth0 configuration is static, no DHCP. ...