Linux Cisco VPN Client - Two Concurrent Connections Possible?

Jun 21, 2008

Server: Dell 2950
onboard NIC only
CentOS 4.6

Is it possible to run two concurrent VPN connections using the Linux Cisco VPN client? We need to have one server be able to communicate over two different vendors gateways.

Do we need to possibly add an additional NIC to the server first?

When we try to connect to another profile we get the error:

Initializing the VPN connection.

Secure VPN Connection terminated locally by the Client

Reason: A connection already exists.

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Max Concurrent Connections

Apr 21, 2009

i have a vps, and im current use lighttpd, but i want move to litespeed Standard. And i see they limit Max Concurrent Connections =150 on standard version.

but what is Max Concurrent Connections? where can i find it.

and is it the number connection via port 80 (netstat -nt | grep :80 | wc -l)?

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Iam currently on godaddy on shared hosting but my site with php and mysql is very slow on queries and get a lot of timeouts

So far i have contacted the below providers and asked them how many concurrent connections on mysql database they support

hostgator - 25 connections
powweb - 20 connections
hostmonster - 30 connections
Servage - 20 connections
anhosting - 50 connections

How is most reliable and i can count on ? I want to tranfer my domain.

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Oct 6, 2008

Is there any host with a shared connection that will allow Unlimited concurrent connections to both http and to mysql.

I Got a myspace clone that just blows through connections when my users are logged in.

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Apr 28, 2009

Currently I use WHM/cPanel latest on a few boxes, I have (at least to my knowledge) copied the exact compile settings between servers, yet some of my servers allow me to do concurrent file downloads (using DownThemAll or another "accelerator") whilst others only let me make 1 connection. These servers also don't show me the final filesize while downloading. So my question is, what did I set/unset to cause this to happen? It's been bugging me for a month or so now and no amount of recompiling has fixed the issue (aside from a clean install of the OS/cPanel). I can provide a list of modules and other config settings if required.

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Windows Server Licensing Per Device Or Per Concurrent Connections

Aug 12, 2008

I will be running Plesk.

I only need 1 user, Administrator with full Remote Desktop Connection access.

But I need to be able to serve websites using Plesk.

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Mar 23, 2009

I am planning to get a Juniper firewall, but due to SSG140 has a maximum of 48,000 concurrent sessions per second, so it triggers me how do I measure the concurrent session of a linux server of the total throughput instead of just port 80?

OS: CentOS

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Jun 25, 2015

I am running Plesk 12.0.18 on Centos 6.4

I have noticed that the CPU on my VPS maxes out. This occurs when there are many concurrent visitors to any of the 7 domains. 6 of the domains run Wordpress and 1 runs php-bb forum. When I run top during high cpu I see multiple "php-cgi":

32664 xxxx 30 10 211m 38m 8228 S 21.0 0.9 0:03.70 php-cgi
32675 xxxx 30 10 209m 38m 7992 S 25.8 0.9 0:02.08 php-cgi
30809 apache 30 10 422m 98m 2492 S 8.8 2.2 0:18.07 httpd

Looking at the process

PID TTY STAT TIME COMMAND
32664 ? SN 0:01 /usr/bin/php-cgi -c /var/www/vhosts/system/websitex.com/etc/php.ini

The net result is CPU hits 100% and visitors are greeted with Service Unavailable ...

Output from /usr/local/psa/bin/php_handler --list

id: display name: full version: version: type: cgi-bin: php-cli: php.ini: custom:
cgi 5.3.3 5.3.3 5.3 cgi /usr/bin/php-cgi /etc/php.ini false
fastcgi 5.3.3 5.3.3 5.3 fastcgi /usr/bin/php-cgi /etc/php.ini false
module 5.3.3 5.3.3 5.3 module /usr/bin/php-cgi /etc/php.ini false

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Jul 28, 2009

I am running lighttpd and eccelerator.

I have stripped the php-cgi.

I have tried forking anywhere from 50 to 300 to 1000 fastcgi children with PHP_FCGI_CHILDREN (through lighttpd, I'll attempt to do with same with spawn-fastcgi and fpm)

Server stats:

Intel Core i7 920
12GB DDR
250GB 7.2k RPM SATAII 16MB Cache

I am using to lighttpd's lighttpd-status to estimate concurrent connections.

When I refresh the panel, it shows that there are around 100-150 connections and around 150 requests/s in the last 5 seconds.

My vmstats show that CPU is 98% idle. Blocks written/read is neglible. MySql key_buffer set to 2gb and I'm pretty sure it's not mysql. The overwhelming majority of requests do not access mysql.

EDIT: Uh oh, I just realized that tcp_mem could be a huge bottle neck.

I just set it to:

net.ipv4.tcp_mem = 4096000 87380000 4194304000

It was previously:
net.ipv4.tcp_mem = somenumber somenumber 393,216 <<<--- WTF!

x1000 for my read values (it's an access server only). I can't benchmark the server right now so let me know if you have any suggestions besides this. I do think that this was the problem. When under load images could not be accessed either.

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Aug 14, 2009

I thought with 802.3ad I could aggregate the links and thus turn a 3x100 megabit pipes to one 300 meg pipe. The problem is when using the default options (and layer2 xmit mode) I only get the bandwidth of a single connection and I see no other traffic on the other two. Here is output from /proc/net/bonding/bond0:

Code:
Ethernet Channel Bonding Driver: v3.3.0 (June 10, 2008)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer2 (0)

MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

802.3ad info
LACP rate: slow
Active Aggregator Info:
Aggregator ID: 2
Number of ports: 3
Actor Key: 9
Partner Key: 3
Partner Mac Address: 00:1e:f6:xx:xx:xx

Slave Interface: eth0
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:1e:8c:xx:xx:xx
Aggregator ID: 1

Slave Interface: eth2
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:04:23:xx:xx:xx
Aggregator ID: 1

Slave Interface: eth3
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:04:23:xx:xx:xx
Aggregator ID: 1
Basically it works in that I get a connection but its no different from being on a regular 100/100 connection. Downloading files my machine from completely different networks always only goes out one connection. I don't even see any received/sent packets from the other two interfaces.

When I tell it to use layer3+4 via the xmit_hash_policy paramter when loading the module IE:

modprobe bonding mode=4 xmit_hash_policy=layer3+4 miimon=100

It seems to work as expected except it looks like all incomming traffic comes in on the same interface and its not much different from a normal load balancing (except from a single IP address). I will stick to this method if I have no choice as I don't really care about the download all that much and it seems to do a good job.

Here is /proc/net/bonding/bond0 from that config:

Code:
Ethernet Channel Bonding Driver: v3.3.0 (June 10, 2008)

Bonding Mode: IEEE 802.3ad Dynamic link aggregation
Transmit Hash Policy: layer3+4 (1)
MII Status: up
MII Polling Interval (ms): 100
Up Delay (ms): 0
Down Delay (ms): 0

802.3ad info
LACP rate: slow
Active Aggregator Info:
Aggregator ID: 2
Number of ports: 3
Actor Key: 9
Partner Key: 3
Partner Mac Address: 00:1e:f6:xx:xx:xx

Slave Interface: eth0
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:1e:8c:xx:xx:xx
Aggregator ID: 2

Slave Interface: eth2
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:04:23:xx:xx:xx
Aggregator ID: 2

Slave Interface: eth3
MII Status: up
Link Failure Count: 0
Permanent HW addr: 00:04:23:xx:xx:xx
Aggregator ID: 2

My understanding is that with layer2 it should just be one big fat pipe. IE: packets are fragmented and thus even a single connection should be able to sustain 300 megabits (if the other end could provide it). It seems like it just doesn't use my other interfaces at all when doing this.

Here is my config on the cisco 2960:

Code:
interface Port-channel3
switchport access vlan 100
switchport trunk allowed vlan 100
switchport mode access
switchport nonegotiate
spanning-tree portfast
!
interface FastEthernet0/10
switchport access vlan 100
switchport trunk allowed vlan 100
switchport mode access
switchport nonegotiate
channel-protocol lacp
channel-group 3 mode active
spanning-tree portfast
!
interface FastEthernet0/38
switchport access vlan 100
switchport trunk allowed vlan 100
switchport mode access
switchport nonegotiate
channel-protocol lacp
channel-group 3 mode active
spanning-tree portfast
!
interface FastEthernet0/40
switchport access vlan 100
switchport trunk allowed vlan 100
switchport mode access
switchport nonegotiate
channel-protocol lacp
channel-group 3 mode active
spanning-tree portfast

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When a login to my plesk, i look this error:

ERROR: Zend_Db_Adapter_Exception: SQLSTATE[08004] [1040] Too many connections (Abstract.php:144)

ERROR: Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] No such file or directory (Abstract.php:144)

ERROR: Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] Connection refused (Abstract.php:144)

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Dec 16, 2007

My host has helped me to install a switch. However, I don't know how to configure using the command line. Could anyone help me?

I need to be able to connect to my Cisco switch using Cisco Network Assistant. If you know the command sequence,

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Jul 16, 2015

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I wish to know how to enable POP3, IMAP, SMTP, FTP protocols with a cryptid connections using native Plesk/CentOS certificate (not purchasing one but self-made by the server). Moreover, I wish to know if it uses SSL or TLS.

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Jun 18, 2014

Since the update I have a problem with my Firewall. I need to set "Allow all incoming connections" under "Server => Firewall" in order to connect over FTP with TLS (explicit). This was working before the update without allowing all incoming connections. How to fix this in the Plesk panel?

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Jan 28, 2015

My Customers and I have Problems connecting to IMAP-Server. By moving through IMAP Folders I get the Massage "Unable to connect to your IMAP server. You may have exceeded the maximum number of connections to this server"

I know this Article: [URL] ... and all the other related to this issue.

[Code].....

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Jul 24, 2008

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Apr 30, 2015

The FTP on my VPs running centos 6.6 and plesk 12.0.18 Update #44 has stopped allowing FTP conections via filezilla or dreamweaver. My tech knowledge with server management outside of the gui is minimal but i have done the following. Checked that the firwall is allowing ftp traffic through the GUI in plesk.

restarted xinetd and checked status
[root@367549 ~]# service xinetd status
xinetd (pid 11707) is running...
[root@367549 ~]# lsof -i tcp:21
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
xinetd 11707 root 5u IPv6 682472 0t0 TCP *:ftp (LISTEN)

Then tried the following
[root@367549 ~]# ftp localhost
-bash: ftp: command not found

But i can connect via telnet on port 21

when trying to use +dreamweaver or filezilla i get the following. This may be due to one or more of the following reasons: - The network cable is unplugged or the network is down. Please verify that the network cable is connected and that the network is up. - The FTP server is down. Please verify that you can connect to the FTP server using another FTP program. - The FTP host name is incorrect. Please verify that the host name is correct in the Site definition dialog box. - Accessing the server requires proxy settings that aren't properly set. Please verify that the proxy settings in the Site category of the Preferences dialog box are properly set, and that the Use Proxy option in the Site definition dialog box is selected. - You may need to connect to the server using a different port than the one provided. Please specify the correct port in the box provided.

Error: The data connection could not be established: ETIMEDOUT - Connection attempt timed out
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listin.

What to do and why after no change this just stopped working when ive been using ftp on this server previous.. the company that i brought the vps from have no intrest and tell me its unmanaged.

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Apr 29, 2015

URL....We are running Plesk 12 on a Linux VPS where we have multiple domains running.Multiple of these domains should redirect from www. domain name. ext to https://ext.domainname.com.This is configured with the Domain forwarding in Plesk, with hosting type Forwarding.But as described in the 2 links provided above, whenever you go to https://www.domain.ext, it does not redirect, and actually shows a Security error, since the domain doesn't have the SSL-certificate installed (because it should redirect to the https://ext.domainname.com).

Clearly we don't want visitors on the website to receive the (incorrect) Security error, and we want all traffic to http(s)://www.domain.ext to be redirected to the appropriate subdomains. allows us to redirect both the https/http connections to the domains, without forcing us to have the domains have a Website hosting add redirect them manually with (for example) .htaccess.

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Nov 5, 2008

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P.S. please consider me as an uneducated person .. my background is designing not programming or network administration.

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Oct 19, 2014

I'm having a hard time configuring this setting for nginx on a domain, whatever i try i cant get it to accept files as big as I need. Every time i try i get this red message :

Code:
Configuration Nginx non valide : nginx: [emerg] "client_max_body_size" directive is duplicate in /var/www/vhosts/system/domain.fr/conf/vhost_nginx.conf:4 nginx: configuration file /etc/nginx/nginx.conf test failed

I followed these instructions: [URL] ....

Strange thing is there was no panel.ini file where the instructions are pointing so i created one, but still, i cant get that directive to work.

Before plesk 12 (with 11.5) i finally got it to work by manually editing some nginx conf file on the server, but i can't find anymore how...

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Jul 2, 2014

All new domains (sites) only display the Parallels page. Upgraded to the following ...

OS CentOS 6.5 (Final)
Plesk version 12.0.18 Update #6, last updated at July 3, 2014 06:56 AM
The system is up-to-date; last checked at June 27, 2014 04:43 AM​

Pretty sure it is a permissions problem, have tried chown -R domain.com.au domain.com.au and returns invalid user.

Can now FTP, use webmail, preview the site and have uploaded a pretty big site .... the Paraellels site displays it as 0mb disk space used and only displays the default Parallels place holder.

This is what a new domain name is displaying ######################################

Files listed in the file manager ######################################

Files uploaded using Filezilla FTP program ######################################

Default place holder ... can't display any other page. ######################################

Have checked all DNS settings and they match the other domains.

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Oct 6, 2014

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The odd thing is that outlook still picks up emails if I receive any, but keeps returning above error every minute.

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2015/05/10 21:46:18 [error] 31224#0: *9 client intended to send too large body: 175420278 bytes, client: XX.XX.XX.XX, server: myserver.com , request: "POST /admin/products/1 HTTP/1.1", host: "myserver.com", referrer: "referrer"

I've been googling this issue and everything points to the nginx configuration (PHP parameters have already been set up). I proceeded to change the configuration of /etc/nginx/nginx.conf to include

http {
...
client_max_body_size 400M;
...
}

HOWEVER (and this is where I'm stuck) after restarting the nginx service, the fille /etc/nginx/plesk.conf.d/vhosts/myserver.com.conf continues to hold the value:

server {
...
client_max_body_size 128m;
...
}

Modifying this file to change the 128m to 400m does not make a difference.

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Jul 9, 2014

I migrate from plesk 9.5 to another server with plesk 12.0.18, and then outlook and mail default from iphone don't work, but tunderbird and webmail work well.

In outlook when i put the same configuration than tunderbird and i try to send mail out from my domain said this error:

Error del servidor: '554 5.7.1 <244.Red-88-18-221.staticIP.rima-tde.net[88.18.221.244]>: Client host rejected: Access denied

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I can recive mail but not send.

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Apr 30, 2015

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couriertls: connect: error:1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher

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