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1answer
22 views

Connecting two GNS3 setups in two VMs in the same PC

How do i connect these two gns3 setups in different VMs? It's all in the same PC. My end goal would be to ping each VPC to each other. I am already able to ping VPCs in with different VLANs but only ...
1
vote
1answer
29 views

connection initiated from linux localhost

One of the linux server was compromised and some of the connections are being originated from localhost to a remote location putting up the information residing on it. I'm trying to trace all outgoing ...
0
votes
1answer
68 views

increase nginx active connection more than 65535

currently I'm doing setup for nginx to accept C1M, I do in my Virtual BOX with Centos 7.0 and RAM 10G. Here my sysctl.conf configuration. fs.file-max = 9999999 fs.nr_open ...
0
votes
1answer
25 views

MySQL connections not closing

I have a web application running on Tomcat7 that connects to MySQL 5.5. I have two servers running the identical code: Ubuntu Red Hat The Ubuntu one runs fine maintaining a steady 8-16 ...
-1
votes
3answers
72 views

3x networks, hardware in 2 locations, 1 connection to join them

Sorry it was hard to think of a title for this, so hopefully I can explain my situation. We have hardware (unix servers) on 3 different network subnets. For example: 10.44.1.0 10.44.2.0 10.44.3.0 ...
1
vote
0answers
61 views

How do I figure out the number of concurrent connections?

Our server architecture is as follows: Windows 2008 Server RC2 WampServer with Apache 2, PHP 5, MySQL 5 Dedicated connection hits firewall, which is routed to a single web server with multiple ...
0
votes
2answers
156 views

FreeBSD Established Connections Maxing out at 300

We've previously had issues in our environment where it seemed we were reaching FreeBSDs max connection limit. We took action demonstrated by http://nginx.org/en/docs/freebsd_tuning.html and bumped up ...
-1
votes
1answer
72 views

Open file count keeps increasing forever

I'm experiencing issues with the number of files opened increasing over time. If I run my server for about few hours, it'll no more accept any connections. The limit was 1024. I've increased the limit ...
0
votes
1answer
139 views

nginx and Mysql Server Load limits (depend on Server config)

my server config is Technology: Ivy Bridge Processor: Intel Xeon E3 1245v2 Intel Smart Cache: 8MB Cores: 4 Threads: 8 Frequency: 3.4GHz+ Turbo Boost: 3.8GHz Virtualization: yes ...
0
votes
1answer
156 views

syslog-ng 2.0.9 closing tcp connections from some clients instantly..?

I've a syslog-ng instance on 2.0.9, which is old, but... this is enterprise IT and upgrading the versions is... fun... running on Solaris 10. I have this strange problem where some clients stop being ...
0
votes
1answer
40 views

minicom cmd not showing

I am using minicom in centos to try to connect to a cisco router. I did the configuration with minicom -s changed the serial port to the appropriate one /dev/ttyS1. Saved as dfl. and Exit. When ...
2
votes
1answer
2k views

Too many established connections left open

I have a (probably quite old) CentOS 4.5 server with a custom java application running inside. I found the application was crashing after some running time and found it was handling 1024 connections ...
0
votes
0answers
80 views

php-cgi on nginx slows server

Im having some trouble with my server lately because of more users coming to my website. If i get around 400 aktive users online, the server is really getting slow and it takes around 20 seconds to ...
2
votes
2answers
80 views

aggregating multiple ISP connections

OK, so we have an office in Pakistan. Phone and ISP service is pretty poor there, so they have 2 ISP connections, one thru Pakistan telecom, one thru a different ISP. The PK tele one has a router that ...
1
vote
1answer
80 views

Can multiple servers listen on the same port when no Bind/Accept has occured

When you have a Windows machine (server or home edition) which is running 2 servers, and they are both listening on port 4000, however none have had a request to connect? What happens when a client ...
-1
votes
3answers
6k views

Can ping servers but cannot connect to them

Sorry in advance if this question is a bit newbi-ish. I downloaded Microsoft Connection Manager and added multiple .rdg files for different servers I need to access. I can browse to only a few of ...
1
vote
1answer
476 views

Mysql remote connections logging

I need to allow remote connections to my mysql server running on latest stable CentOS. I don't like this idea at all so I want at least to collect as much relevant information as possible. To be ...
14
votes
1answer
20k views

What value of thread_cache_size should I use?

I'm using Asp.Net together with MySQL. In the .Net connection string, I have set Max Pool Size to 150. If I run the following I get these values: SHOW GLOBAL STATUS LIKE 'max_used_connections'; ...
3
votes
1answer
417 views

Windows 7 Network Connections empty

Whenever I try to look at my network connections, the window opens up empty. The only thing shown is the Organize button. I went into Device Manager and deleted my network devices, but now ...
3
votes
2answers
261 views

On a LAMP stack, how to limit the number of concurrent connections and serve a static page for those who are beyond that limit?

I'm aware of the Apache directives MaxClients and ListenBacklog. I'm trying to set a limit of, let's say 100 concurrent connections after which the new connections will be served a static page. Can ...
1
vote
1answer
3k views

haproxy and persistant connections

I am using HAproxy to load balance between more web server. Those webservers are using PHP and sessions to keep one's session open. Now, I think that when a user refreshes the page, it is sent to one ...
0
votes
1answer
531 views

limiting the number of global connections per second

I want to limit the number of ALL incoming NEW connections on a port, not only from one IP, something like: iptables -I INPUT -p tcp --dport 22 -m state --state NEW -m limit --limit 3/s -j DROP But ...
2
votes
2answers
535 views

How can I connect to some old Sun servers?

We have some old Sun servers (V125, V210, V240, T2000 amongst others) sitting unused and I've been asked to find out if there is anything useful on them before they get wiped and disposed of. ...
2
votes
2answers
522 views

CentOS 6.2: apache stops accepting connections

I have server with CentOS 6.2, apache 2.2, php 5.3, mysql 5.1. Server is installed in KVM container. From time to time apache stalls. It just stops accepting connections. Looks like it reaches ...
1
vote
1answer
2k views

windows 2008 R2 server IIS 7.5 not loading pages on first visit…requires refresh 2 or 3 times

This could be a network thing at my ISP where my box is colocated...not entirely sure. I wanted to just check here to see if anyone has seen an issue like this that is server related so I can check ...
0
votes
1answer
301 views

Best way to connect two separate networks with separate internet connections within the same building

I'm a programming intern, and since I'm the only one in the company who seems to have rudimentary knowledge of Linux I've been given the task of setting up a network so that employees may share files ...
0
votes
2answers
1k views

Very large number open connections from web to DB server

I run 2 servers, 1 web (nginx/php), 1 database (mysql). Nginx has about 1500 active processes per second, and mysql status shows about 15 currently option connections on average. Now today i started ...
1
vote
3answers
270 views

Cached content causing a huge number of 404 errors, too many connections

My site has been largely unresponsive for three days due to a large amount of traffic. A JavaScript element on the page regularly requested images from the server, and the number of connections ...
6
votes
4answers
3k views

How do I check how many connections are open currently on a specific TCP port?

I'm doing some comet benchmarks and would like to see how many open connections I have. Actually I use netstat: netstat -ant | grep 8080 | grep EST | wc -l But it needs around 4-6 minutes to list ...
0
votes
1answer
50 views

Switches and the amount of load

Out of curiosity does anyone know whether it would be more beneficial to have more switches with less terminals on each leading to your main switch OR load up each switch fully before having any ...
0
votes
1answer
630 views

Custom “workers” error on Nginx?

i'm having some problems with nginx. I think it's easy to solve, but i'm extremely newbie in nginx, so: When worker_connections reach limit, nginx return a 500 internal server error. I want to ...
1
vote
2answers
479 views

How to monitor/log internet up time

I have home network setup, where I have 1 thomson wifi router, 2 telephones, 1 tv, 1 desktop and 4+ laptops. I have the Estonian standard internet of ~15 Mbps for the last 4+ few years. The desktop ...
1
vote
2answers
1k views

Cisco 2516 Console access via RJ45 port?

I have just taken delivery of a basic Cisco lab and I would like to check the routers and switches etc. are in 'working' condition before I start playing around with them. The first hurdle is ...
0
votes
1answer
489 views

When Does the Linux & Windows' Samba Port Connection Close?

After connecting to a samba share, then disconnecting, netstat still shows that the ports are ESTABLISHED, even when the clients are on SUSPEND, HIBERNATE, or have SHUTDOWN. Looking over the samba ...
0
votes
1answer
3k views

Find out which users are connected to a shared printer

Today we're migrating to a new file and print server, which made me wonder, is there a way to see which users are connected to a shared printer? It's possible to see connections to shared folders in ...
-1
votes
2answers
312 views

how can a server handle lots of port 80 connections

Admittedly this is a simple question but 20 minutes of googling and I just can't find an answer... I will frame my question with an example. say I own www.reallypopular.com and my website sees 100 ...
1
vote
1answer
88 views

is there any problem with my server

Below is a Munin Service Monitor screenshot for netstat by day which have a lot of failed connection. so I need to know is this a serious issue?
0
votes
2answers
140 views

LAN-intern solution for server-side auto-IP-block

We got the problem, that our web server provider blocks our static IP address automatically, when we reach 200 simultaneous connections in the time window of 300 seconds. I'm running an Ubuntu server ...
0
votes
2answers
320 views

monitoring the size of an SQL Server connection pool

We are trying to track down a performance issue. One theory we have is that we are running out of connections in the connection pool. Is there a way to monitor the size of a connection pool?
0
votes
1answer
1k views

jboss 5.1 mysql connection pooling

I am using JBOSS 5.1.0.GA, MySQL 5.5 and Hibernate 3.3.1 GA (included with JBOSS) + Spring. My question is do I need to add c3p0 as a data source in my spring/hibernate configuration for connection ...
0
votes
1answer
887 views

listenbacklog directive not working in apache2.2

I was trying to make apache 2.2 reject connections if MaxClients was reached, to do this I found the directive ListenBacklog.To test it, I configured apache in the following way: <IfModule ...
7
votes
3answers
773 views

mysql “Too many connections” killed the network?

So I'm pretty confused here, figured I'd throw this out here and see if anyone else has any good ideas. We suffered a pretty big outage two nights ago, and I'm still searching for the root cause. I ...
2
votes
4answers
243 views

Oracle performance problem

We are using an Oracle 11G machine that is very powerful; has redundant storage etc. It's a beast from what I have been told. We just got this DB for a tool that when I first came on as a coop had ...
1
vote
0answers
235 views

Auto switching between wired and wireless connections

How about this situation. Our business deals a lot with medical information. And some of our clients have demands based off HIPPA, etc. There is one now where they do not want an employee to have both ...
2
votes
3answers
226 views

How to downgrade a 120 Mbit line, to test website speed?

How to downgrade a 120mbit line (our current connection) temporary to a 10mbit to test what our potential clients with less speedy internet are experiencing as the website loads? At this moment ...
1
vote
2answers
1k views

How can I drop all connections to a given host under FreeBSD?

I know about tcpdrop which is in base distribution. But this tool requires port numbers to be specified. Is there any tool to drop connections by IP?
0
votes
2answers
4k views

Windows Server 2008 network limitations?

Please tell me: Are there some limitations on connection/socket/http in Windows Server 2008 R2 editions family? For example i am pretty sure that some of servers will have 100+ connections (by ...
0
votes
3answers
4k views

There seems to be some 'lingering' SSH connections on my server. How do I fix it?

[root@server mike]# w 14:43:35 up 83 days, 1:25, 1 user, load average: 0.00, 0.00, 0.00 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT mike pts/1 dsl-IP.w 14:43 ...
1
vote
1answer
178 views

Please recommend an affordable cisco product capable of handling up to 100,000 plus simultaneous tcp connections [closed]

I am setting up my server lab, can you please recommend an affordable and very reliable router than can handle over 100,000 simultaneous open tcp connections without breaking a sweat? Thanks!
1
vote
1answer
1k views

Iptables, NAT: avoiding limit on max number of requests per IP by using multiple IPs

In my network, there is a machine which has to make a http request towards a server which is beyond a firewall. This machine's ip address (as seen from beyond the firewall) can be chosen from a pool ...