I have Apache2 installed on my dedicated server. I would like to install a mod / configure my Apache Server in order to limit simultaneous connections / IP.
The thing that I want is that for example if I want a maximum of 2 simultaneous connections / IP, when that IP reaches the LIMIT, I would like to delay its next request, and NOT display him a 503 error like most mods DO.
Is there anyway to test how many simultaneous connections my host is allowing me to have? I seem to be getting alot of people telling me my site is unavailable and so on when I'm not having an issue. My site joomlaplazza.com and host by VT6 extreme account.
Cpanel.
Can I check what is the maximum number of connections for Remote Desktop Protocol in say W2k3? Also anyway to increase that? This question has been bugging me for a long time.
View 3 Replies View RelatedMy VPS had some high %wa this two days,when i refresh(F5) WHM %wa will go to 18-20% and us sy just 1 or 2
Is it my vps provider have a very bad oversell?
I/O Wait is increasing on my server, please advise what to do: some times it is within 30 % and sometime it is up to 90%
top - 04:40:44 up 5:30, 2 users, load average: 4.57, 2.64, 3.24
Tasks: 171 total, 2 running, 169 sleeping, 0 stopped, 0 zombie
Cpu(s): 18.3% us, 4.3% sy, 0.0% ni, 0.0% id, 77.0% wa, 0.3% hi, 0.0% si
Mem: 1027556k total, 1021944k used, 5612k free, 85460k buffers
Swap: 2040244k total, 2068k used, 2038176k free, 147752k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16754 apache 15 0 96140 58m 5948 S 8.3 5.8 0:04.95 httpd
19760 psaadm 15 0 36936 3628 1548 S 4.7 0.4 0:00.14 httpsd
5417 apache 15 0 103m 67m 5984 S 2.0 6.7 0:13.00 httpd
2738 mysql 15 0 394m 79m 4660 S 0.7 7.9 1:25.08 mysqld
28294 apache 15 0 104m 68m 6076 S 0.7 6.9 0:25.33 httpd
39 root 16 0 0 0 0 S 0.3 0.0 0:06.16 kswapd0
2857 root 16 0 4788 752 628 S 0.3 0.1 0:03.09 couriertcpd
3022 qmails 15 0 2304 484 372 S 0.3 0.0 0:09.28 qmail-send
32688 apache 15 0 96112 58m 6000 S 0.3 5.8 0:10.76 httpd
5632 popuser 15 0 35588 29m 2344 D 0.3 2.9 0:30.44 spamd
9850 apache 16 0 100m 65m 5996 S 0.3 6.5 0:09.85 httpd
12418 apache 16 0 99796 62m 6296 S 0.3 6.2 0:08.56 httpd
19578 qmaild 15 0 4008 840 692 S 0.3 0.1 0:00.01 qmail-smtpd
1 root 16 0 1652 552 472 S 0.0 0.1 0:00.70 init
2 root 34 19 0 0 0 S 0.0 0.0 0:00.29 ksoftirqd/0
3 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/0
4 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 khelper
5 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 kacpid
19 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/0
37 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pdflush
38 root 15 0 0 0 0 S 0.0 0.0 0:01.07 pdflush
40 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0
20 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd
186 root 25 0 0 0 0 S 0.0 0.0 0:00.00 kseriod
295 root 15 0 0 0 0 D 0.0 0.0 0:06.68 kjournald
1373 root 6 -10 1904 456 380 S 0.0 0.0 0:00.01 udevd
1606 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kauditd
1648 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kmirrord
1672 root 19 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
1673 root 19 0 0 0 0 S 0.0 0.0 0:00.00 kjournald
2360 root 15 0 2160 552 456 S 0.0 0.1 0:07.27 syslogd
2364 root 16 0 2620 384 316 S 0.0 0.0 0:00.00 klogd
2391 rpc 15 0 1952 548 452 S 0.0 0.1 0:00.00 portmap
2410 rpcuser 18 0 2400 724 620 S 0.0 0.1 0:00.00 rpc.statd
2436 root 16 0 4628 340 172 S 0.0 0.0 0:00.00 rpc.idmapd
2507 root 17 0 3060 508 300 S 0.0 0.0 0:00.00 smartd
how many simultaneous users on the 2 hostservers below can .
Here are some spec from 2 hostservers.
Processor Pentium 4 2.4Ghz
DDR Memory 1024mb
Hard Drive 80gb SATA
and here is the second one .
Intel Xeon 3040 Dual Core 1.86GHz Processor
2 GB 667MHz ECC RAM
Dual Gigabit Ethernet NIC
2 x 160GB SATA2 Western Digital disks
if you now a better one please tell and give the spec from the server and the number of simultaneous users it can handle.
And lets say fore the simultaneous users that they are on a forum.
I would like to know if it is possibl to limit SSH logins for any user to 2. The OS is CentOS.
View 3 Replies View RelatedFor the past couple of days, I've noticed that there is alot of apache processes running in the "D" state and that my IO wait is up to %80. I straced one of the processes and the result is its locking on a php session:
$ strace -p 3230
06:57:12 open("/var/lib/php/session/sess_86ecf346c6f7adba93cb1077f6b95d43", O_RDWR|O_CREAT,
0600) = 44
06:57:12 flock(44, LOCK_EX
And this is the output of lsof
[root@xeon ~]# lsof | grep session
mysqld 3212 mysql 178u REG 8,33 275456 26099994 /hd/mysql/sitebuilder3/session.MYI
mysqld 3212 mysql 183u REG 8,33 354592 26099937 /hd/mysql/sitebuilder3/session.MYD
bash 6426 root cwd DIR 8,21 1060864 25133096 /var/lib/php/session
httpd 6698 apache 44uW REG 8,21 115 9814967 /var/lib/php/session/sess_e0f1bb824667860260f9e5bd53da54e9
httpd 6704 apache 44u REG 8,21 138 25135115 /var/lib/php/session/sess_325b2701fcb8fb2d8371d1dd72660e8b
httpd 6718 apache 44u REG 8,21 138 9814423 /var/lib/php/session/sess_a28662f28c3fe91926c7c96267fe324f
httpd 6723 apache 44u REG 8,21 115 9814794 /var/lib/php/session/sess_79249a69f0a929318c3a8d25b1102ff4
httpd 6765 apache 44u REG 8,21 14 9815234 /var/lib/php/session/sess_0983ce89bad9d37eccec89fe83985945
httpd 6773 apache 44u REG 8,21 141 9815254 /var/lib/php/session/sess_298731e4cb90e58f223bc1b1b2da8cef
httpd 6782 apache 44uW REG 8,21 175 9814514 /var/lib/php/session/sess_608cf6bb40ba33a7505f3857e32c3854
httpd 6786 apache 44u REG 8,21 139 9814480 /var/lib/php/session/sess_10913da266608052ffd08e5fa39356c7
httpd 6787 apache 44uW REG 8,21 138 9814292 /var/lib/php/session/sess_3e0fac0590d02b4f111ce4bee9a8bfe1
httpd 6790 apache 44u REG 8,21 14 9815287 /var/lib/php/session/sess_cdfeac2790c55a62744a66caef886857
httpd 6794 apache 44u REG 8,21 138 9814423 /var/lib/php/session/sess_a28662f28c3fe91926c7c96267fe324f
httpd 6798 apache 44uW REG 8,21 93 9814971 /var/lib/php/session/sess_fa0f81edfd26e8653bc94bc9f9af6f6d
httpd 6801 apache 44u REG 8,21 138 9814423 /var/lib/php/session/sess_a28662f28c3fe91926c7c96267fe324f
httpd 6802 apache 44uW REG 8,21 138 9814423 /var/lib/php/session/sess_a28662f28c3fe91926c7c96267fe324f
httpd 6811 apache 44uW REG 8,21 115 9814802 /var/lib/php/session/sess_396f6670549934766bd8268f0b5628fc
httpd 6822 apache 44u REG 8,21 153 9815061 /var/lib/php/session/sess_0d1fcc65d1964fc3d354e4b94f3638eb
httpd 6833 apache 44uW REG 8,21 153 9815173 /var/lib/php/session/sess_05ed9e41766579f10cfdaa2f7e737a1a
httpd 6846 apache 44u REG 8,21 236 9815142 /var/lib/php/session/sess_23b5cad8471778391bf9748d0f4f1230
I've ordered server from LeaseWeb two weeks ago and still wait for the server setup. Its looks to slow for me - we are used to wait only a few hours for servers setup in datacanters in the US.
I'm afraid that such slow response will be also in response and level of the support. Do you think I should cancel this service and look for other provider in Europe? If yes please suggest such provider.
I've paid in advance by paypal for 3 month(~ 500 EURO). Do you think I will be able to cancel that payment?
In learning that some hosts seem to be tightening shared hosting specs, I'm wondering what a 'simultaneous process' is... as from this clip: 'number of simultaneous processes should not exceed 5'.
Is each part - for example, graphics and includes - of an individual webpage a 'process'?
I'm with one of the big shared hosts. Support is patchy at best, which isn't a problem until you require help at which point it's agonising as you have to wait an age to get an unsatisfactory response.
At the moment the server I'm on is suffering from consistent outages (it's been up and down over the last few days). Support has been hard to get hold of at times (right now my site is completely unacceptable for me and there's no-one tending the live support chat - which is the only chance of getting a prompt response).
My question is should I be actively looking to improve my situation (it's amazingly frustrating to spend the best part of a day doing small updates, which because of instability, take hours instead of minutes) or should I just wait until it blows over (to be fair server issues tend to be fairly infrequent, but they do flair up every so often). I can't really afford to pay that much more than I am (say $20-$50 a month max) so am I stuck with shared hosting or is there anyway to pay a little more (my current package costs around $10 a month) to get better support and stability?
After a initial look around would something like MediaTemples GS or the low end MediaTemples dedicated virtual service be suitable? The pages do have moderate database use (a few forums and galleries) and use around 50GB a month bandwidth (which would climb slowly in future months)?
I have done some searching here but wasn't able to find what I was looking for, so am making a new post.
I have a client who needs an online training web application. I have done plenty of sites in the past, but none with streaming video so am really unsure what type of hardware this requires. At peak the client expects 50 users watching streaming video at the same time (so lets double it to 100 to be sure). What type of server hardware requirements am I looking at to deliver that content at a good speed with little to no hick ups? Also, is a 100Mbps link good enough?
I just got a VPSlink account about a month ago and for all testing purposes, it has been great so far [my first VPS]. But I haven't transferred my main site to it yet mainly due to one specific question about download speeds. Quickly, here's what I've found about their network...
VPSLink is owned by Spry, so from all I can tell, they're using the same network speeds. Which are:
Unmetered: 1.5 megabits per sec in total traffic.
Metered: Spry's site says "throughput of up to 8Mbps"
Ok, so here's what I'm trying to find out:
I'm running a small software business with some downloads (all legal of course - they're mine ) and would like to know what the real-world download speeds that users would normally see when downloading my files. Here are the knowns:
a) Let's assume for this question that all of the user computer's are on very quick connections, so their speed wouldn't be an issue.
b) An example file would be say, 20 MB.
I'm most looking to see how speeds would be (in Kbps) if say, 20 people are downloading a 20 MB file at the same time (again, with their connections being extremely fast; fast enough for the sake of this example to not be a factor - so the max speed would only depend on my VPSlink server's connection).
I don't know of a good way to really test this since I only have access to 1 physical connection. I did try a test with a friend. Here's what happened:
I normally get about 500-600kbps sustained on my cable modem, as does my friend. When downloading a test file on my server I was able to get about that when downloading all alone. But, when my friend and I downloaded it at the same time, both of us got around 350kbps -- so the total speed about dropped in half. Again since my site is for software downloads, and when releasing an update to one of our products, sometimes I'm guessing 20+ users download simultaneously for a couple days.
This currently seems to work ok on Dreamhost, but for many other reasons, we're needing a VPS. But would this vastly decrease our file transfer download speeds to users? If users got something horrible like 2kbps, that would most certainly loose a lot of business for us since they'd just get frustrated and cancel for the most part.
Does anyone know of a rough estimate on how to figure this out, or even better, are there any VPSLink customers out there that have experience with this?
Any one facing any issue when Running CPanel on the VPS.
I always seem to be getting these errors only for Cpanel VPS only.
kernel: TCP: time wait bucket table overflow
kernel: TCP: too many of orphaned sockets (90 in CT****)
Even Cpanel Install by SSH or VePortal gives the same error.
PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE
Parallels Plesk Panel 11.5.30 MU #44 CentOS 6.5 (Final) 64bit
2 of our our servers are suddenly experiencing high Wait I/O Times, and high Load Averages during the backup process. During this period the Plesk grinds to a halt, sometimes crashing out completely (although SSh is still possible. We have been in talks with our server suppliers (assuming this would be node related) however they have done a lot of testing etc. and categorically state the node is fine , with no other users affecting it.
STEPS TO REPRODUCE : We backup the server using the scheduled backup service and Wait I/O immediately goes up.
ACTUAL RESULT: Plesk downtime / Website downtime
EXPECTED RESULT: No downtime, successful back up
Some other info :
All other processes (MYSQL, apache, Nginx etc) are all running between 1 - 10%
Partition "/usr" utilization 4.2% used (1.81 GB of 43.3 GB) (?)
Partition "/var" utilization 50.6% used (61.8 GB of 122 GB) (?)
We are struggling to identify what has changed on the server that would cause this sudden change.
Simultaneous FTP User Question - Cpanel/WHM/Pure-FTP, Dual Xeon 2.4, 1gRAM, Dedicated
Does the following dedicated server spec throw any flags for you when considering our intended future use?
DEDICATED SERVER SPEC
Dual Xeon 2.40 ghz.
1 gig RAM
INTENDED FUTURE USE
- We currently host 300 low volume websites on the server.
- We only use 40 gigs of data bandwidth per month. (1000 allotted)
- We developed a new software product that allows auto-updates 300kb of data each day.
- We expect up to 500 people to use this software and need to access our FTP daily, at different times of the day (random).
- We plan to embed the FTP information into the software.
The FTP access will be transparent to the user.
Does our dedicated server sound like it could handle this? My guess is yes.
Sometimes my server surcharge load average increase at 60 , and all my configuration are OK
when i type :
netstat -plan|grep :80|awk {'print $5'}|cut -d: -f 1|sort|uniq -c|sort -nk 1
i have : ...
I tried to update a plugin at my blog its a wordpress blog, as soon as the update was started that site on the server stopped working, (later on i closed the upgradation window), after few minutes website start working automatically, Now in my opinion I think that update process is still running in background thats why connections are creating continuously to that website IP.
[root@server ~]# netstat -alpn | grep :80 | awk '{print $4}' | cut -d: -f1 |sort |uniq -c
1001 serverIPhere
its even touching 1500, I tried to contact my server support but unfortunately they can investigate the issue, instead they told me to check with the following command.
netstat -plan |grep :80 | awk '{print $5}' | cut -d: -f1 | sort | uniq -c
which is not an answer to my question. Can anybody please tell me why those connections are making to that website's IP? I don't think its a Ddos attack, because it was just started when i updated the plugin.
Could someone comment on the kind of load a VPS service can handle? If I were to run an HTTP server how many connection/sec would be realistic.
View 3 Replies View RelatedHow many simulteanous connections to the site do alot of webhosting company usually allow with shared hosting packages. I was wondering because4 some companies say pay $$ a month get 300gb of bandwith a month. Can they limit the bandwith by limiting your simulteanous connections? I am asking because I just found out my host only allows 50 per hosting package that is on a shared server. To me that seems to be very little.
View 1 Replies View RelatedWARNING: One or more of your DNS servers does not accept TCP connections. Although rarely used, TCP connections are occasionally used instead of UDP connections. When firewalls block the TCP DNS connections, it can cause hard-to-diagnose problems. The problem servers are:
Error [No response to TCP packets].
APF is installed on the server, how do I allow TCP DNS connections? I already added port 53 to ingress/egress for TCP and UDP.
I run this a few times a day:
netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n
and get outputs like (just the bottom here, IPs removed):
8 IP #1
8 IP #2
8 . . .etc
8
9
9
9
9
9
10
10
11
12
13
14
15
18
19
25
26
32
32
91
The server runs gallery2, how many connections does an IP need just to browse the gallery? I'd like to block wget etc, but don't want to hurt search engine optimization (SEO). Is there a compromise, like limiting IPs to 5 connections, so the site still gets crawled, just slower?
DDoS deflate is installed: [url]
which permabans IPs with 150+ connections
Also what are the commands to block and unblock these IPs,
Firewall TCP Out Connections
My server started lagging up and I processed my configserver firewall logs and founds tons of TCP out connections. How can I track down which user was making these connections, if possible?
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)?
Has anyone worked with the cable companies on internet connections for hosting? Eg. Comcast, TW.
I worked with a sales rep for Comcast a few years ago on a solution for our offices. He worked out a line that would give us 3+mbits up speed for less then the price of a T1.
It also included a dedicated line to our offices. Would using a cable line be a bad idea for a hosting connection?
Most of them are from Google and Yahoo...
Server is being heavily loaded beause of this.
I guess blocking crawlers is not the most brilliant
I signed up for a hosted account with gator and I don't understand something. They tell me it's a policy change for security reasons but the simultaneous SSH connections has been limited to 2. That's just nuts. Is there a real reason why someone would limit this? i need two for editors, one for shell and one for mysql. Minimum of 4. What security concern could cause them to pick 2 as the number?
I just don't get it.
Here's what they said to me.
info: Please wait for a HostGator operator to respond.
Channel Sanderson: Hi. We're working on our website and have run into a small snag. It seems we can only have two open SSH connections at a time this week. We were able to open more a couple weeks ago. Is this something that you can change?
Kella J.: Ok, the issue is.. You are only alllowed 2, no matter what..
Channel Sanderson: I believe we are not understanding each other. We're not trying to connect 10 times in a minute. We just need more connections. 2 is insufficient. We need a minimum of 4 simultaneous connections to our server.
Kella J.: I am sorry, I checked with my admin.. he said there is only a limit of 2, period..
Channel Sanderson: This is an unnecessary limitation in my view and badly limits my ability to do what I need to do.
Just logged in my cPanel, and Apache Server Status shows
Parent Server Generation: 7
Server uptime: 2 hours 52 minutes 5 seconds
Total accesses: 701666 - Total Traffic: 63.7 GB
CPU Usage: u1610.22 s255.4 cu0 cs0 - 18.1% CPU load
68 requests/sec - 6.3 MB/second - 95.2 kB/request
400 requests currently being processed, 0 idle workers
I told customer service and said my website (a big forum) have 4000 people now, I felt very slow, could the slowness caused by this max apache connection setting?
I got reply: "400 seems to be as high as Apache can go. Your httpd.conf settings currently show 500 max connections enabled. If Apache is stopping at 400 then this is it's hard limit for maximum connections. Also If it was able to go even higher you would eventually run into memory issues on the server that would cause the server to crash."
Can anyone tells me if "400 requests currently being processed, 0 idle workers " is a problem or could it be the cause of the slowness. I imagin if more people request connection, and apache can't deal with that much, it has to let those request wait in the queue, therefore caused slowness or time-out.
The seem server could deal with 8000 people online before, no any problem at all and speed was quite fast. I don't know what i should do now.
I've had a problem a couple of times where there is a bad ftp connection to a host. A trace reveals that there is a node timing out. What is a good way to work around this. Web based ftp client or other solution?
View 0 Replies View RelatedHow can I Limit connections per IP in IIS6?
For example 10 connection per IP is allowed in a minute.