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 RepliesI have apache rotate the logs daily and keep them in the users home directory in /logs/, however; these logs pile up over time and I need to delete them by hand. What is the best way to automate deletion of these log files? For example, i'd like to delete the logs after 7 days of logging. Can I do this with newsystemlog or somethign similar? Or do I need a shell script?
View 2 Replies View RelatedI've had an issue come up recently that I haven't had to deal with before. I'm starting to get regular errors during peak traffic times saying that I have more then the max_user_connections allowed.
I tried setting this to a higher number using ini_set. Unfortunately my host overrides this. I've talked with the host and they cannot up the 15 user maximum.
I've been with this host a while and they have great support and really great service. I understand their need to limit this because it is a shared environment.
I'm wondering if there's anything I can do on my end to help avoid this problem.
Is the only option switching somewhere that lets me have more maximum connections? At the rate I'm going this problem will continue to grow, so it needs to be solved quickly.
I've got CSF setup, but the problem is, I can't seem to keep the SYN Attack blocked without blocking all my legit hits.
View 5 Replies View RelatedI was checking my business server's IIS errors logs when I ran across the following error:
2007-05-19 08:21:10 00.000.000.00 2243 00.000.000.000 80 HTTP/1.1 GET
/w00tw00t.at.ISC.SANS.DFind 400 - Hostname -
Additional information about the those responsible for the hack attempts are as follows
(retrieved from domaintools.com):
CustName: ----------------(hidden by me)
Address: Private Address
City: Plano
StateProv: TX
PostalCode: 75075
Country: US
RegDate: 2005-08-27
Updated: 2005-08-27
Apparently this person was trying to use the dfind hacker tool to find vulnerabilities on my server. The IP address belongs to AT&T Yahoo; and I've already contacted them by email. I believe that subsequent hack attempts have originated from this IP, however, the IP address has been masked by the use of proxies. I think that this may be someone I know because the IP is only about an hours drive from me. I'm starting to suspect a disgruntled former client who has friends living where that IP's from.
Has anyone here had any similar experiences?
What do you think AT&T Yahoo's response will be?
Is there anything else I can do or should not do?
I am also considering reimaging my server because of system issues but I am concerned that would erase any information needed for investigative purposes. I have saved my log files, though, on a CD but I'm thinking that AT&T Yahoo or whoever investigates this needs the server as it is.
I have a spider that is saving a few images files everyday on my servers. Due to the fact that the images are dynamically created the spider is not only saving them without an extention, but also using charachters from the link to create those file names.
I end up with:
0&Y=0
1&Y=0
2&Y=0
3&Y=0
.... and so on.
(there is no problems browsing those image files
What I need is to copy those files or move them to file names with an extention (png) for protection reasons.
I failed using cp, mv in doing so. it seams that the OS doesn't see those files as files.
That is how those files appear in ssh:
0&Y=0
1&Y=0
2&Y=0 ...
We've been seeing sluggish performance on our mail gateways, and so I started doing some digging in the logs. It looks like we are filling up with messages like:
2007-05-16 12:22:16 Connection from [xx.xx.xx.xx] refused: too many connections
We have our max connections set to 20 (total, not host-specific) in exim4. So I started tailing the logs, and sure enough, we are getting bombarded with requests to randomstring@ourdomain.com coming from all over the map. The requests are getting denied of course, but that doesn't help the connection issue since they are consuming all of them, preventing real mail (for the most part) from getting through.
What is the proper way to deal with something like this? I could certainly just up the max connections value from 20 to 40 or 50 or whatever, but I'm not sure what kind of performance impact that will have on the rest of the traffic going through our gateways.
Since the spam attempts are coming from all over the place, it doesn't seem like I can just firewall out a few addresses and be done with it.
This particular rack is a cluster of web and database servers behind two gateway boxes, which handle the mail traffic (so this problem is on the gateways, the actual mail server itself sits behind the gateways and never actually sees these fake emails).
I've been pretty happy with my servers with theplanet/ev1servers for the past, err, 5 years. But the OSes were out of date and it seemed like I could stand to get some significantly improved hardware for what I'm paying now (or, comparable hardware for a lot less).
I put in a RFQ from ThePlanet to see what I could do as far as upgrading my current server, hoping for something a little better than buying a new server while the old one is up and moving everything over, and also hopefully avoiding re-paying a one-time fee I had for a secondary hard drive.
Now I have no problem whatsoever with the result -- that my only option is to buy a new server, they won't migrate my HDs, and they won't upgrade my current server, and they won't give me any kind of credit for the second hard drive or let me transfer it to a new server. I get where they're coming form, even though it might make sense to figure out something a little better for a customer of 5 years that's dropped about $25k over that time period.
The problem is their sales staff. I'm surprised that theplanet (at least theplanet I remember from when I signed up) would have sales people so apathetic and basically useless.
Getting information I requested in my initial ticket took back-and-forth with a sales rep over the span of over 24 hours (and I still haven't really gotten an answer on one part, about my secondary hard drive). Actually looking at the ticket now, the initial response was over 24 hours after I opened a ticket (and it was opened during working hours).
Heck, the first two responses didn't even include a price for the hardware he wanted me to buy, just if I wanted to proceed and buy it.
Figuring it beats waiting I did one of their instant chats and before answering my questions I was told to be sure to give the guy credit for the servers I order. In fact, him telling me his contact information and to choose him were the only complete sentences I got, and roughly 80% of the communication I received.
I haven't needed support on my server recently, so I can't speak to if this is the quality of their support department now. I don't think I'll be around to find out though.
(Executive summary: Hello SoftLayer!)
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.
How can I Limit connections per IP in IIS6?
For example 10 connection per IP is allowed in a minute.
my server always have problem about the mysql connection:
Discuz! info: Can not connect to MySQL server
Time: 2004-5-14 8:55am
Script: /index.php
Error: Too many connections
Errno.: 1040
Similar error report has beed dispatched to administrator before.
i find the solution:
add "set-variable = max_connections=1000" in my.cnf file
but didnt find the file my.cnf,my control panel is directadmin,
My PHP application is starting to reach max mysql server user connections limit (currently set to 60). I listed mysql process list in phpmyadmin and found there lot of queries with status "LOCKED" these hang there for a long time(not always just sometimes - twice a day) and then connection limit is reached. It causes load average about 40 for as long as 10 - 20 minutes
I think it may be bacause of query structure. There are some queries with many inner joins...
Here is typical situation from phpmyadmin's process list:
1. select ... from table_1
inner join table_2
inner join table_3
inner join table_4
inner join table_5
This show status : "Copying to tmp table" in phpmyadmin
2. update table_2 set ....
This shows status: Locked
3. select ... from table_2
This shows status: Locked
Seems then when temp table is being created the table_2 is locked and it cannot make update to table_2. or maybe it's locked because of just that update on table_2.
I want to avoid of creating temp tables... Can it help if I'll make separate selects without large table joins ?
My site is hosted on Dreamhost and gets over 1 million hits a day. The site is highly optimized, so it can handle the load easily without slowing the server down. Most pages have a loading time of under 0.2 seconds.
However, Dreamhost is telling me now that I'm using up too many "connections" and have limited my connections to 150 every 3 seconds (or so they say). Now 503 errors are coming up left and right, and its highly annoying to me and my users. Oh, and Dreamhost has mentioned several times that I'm oh such a very good candidate to upgrade to $400/mo dedicated hosting (from $8/mo currently).
So my question is, is this connection restriction really a valid concern of Dreamhost or are they just trying to milk me for money because my site is popular?
on setting up some sort of firewall who only allows 10 connections from the same ip to avoid spamming, abuse on the server.
How should i do this?
is a way to understand whats the bext max apache settings for me?
Maybe to look over httpd-status requests currently being processed and the number of idle servers or the number of strokes?
Or probably the best way is to use some benchmark application but then i am not sure how to test my config?
I currently have two 30/10 MB connections and I am hosting a MMO Gaming server on one of them. I have seen some topics on some forums but never really had the need to do this but now since I am getting quite a few users It would be best for me to start looking for a way to upgrade my connection. This is the fastest connection in my area. Anyways I remember hearing about a router that could combine two connections. And I was wondering could this work hosting a gaming server? I think i remember someone saying that i could setup a domain to route the server to connect to both the ips allowing twice the amout of people to connect to the server with out (connection) lag. I was wondering if this is true.
And if someone would link me to your unrecommended hardware that would be great.
I plan on installing dos_evasive as it can temporarily kill/ban an IP that makes over X amount of connections.
I ran netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n, and this is what I got:
10 218.111.214.231
10 219.95.251.185
10 222.124.226.228
10 58.187.167.20
10 61.94.234.75
10 62.168.125.217
10 82.160.42.74
10 87.116.131.18
10 89.41.71.178
11 200.193.24.226
11 218.186.9.1
11 219.93.199.121
11 220.235.171.64
11 59.128.43.234
11 60.53.77.34
11 63.109.246.234
11 83.20.72.102
11 83.237.102.75
11 84.234.144.107
11 88.226.100.145
11 88.240.137.82
12 195.229.236.216
12 203.79.252.192
12 212.90.248.182
12 220.132.87.2
12 80.130.75.239
12 82.114.184.16
12 83.26.18.242
12 85.30.223.227
12 86.108.127.28
12 87.109.49.69
12 88.247.64.131
13 200.52.193.228
13 202.155.71.40
13 222.124.172.177
13 82.116.129.110
14 195.93.21.1
14 41.251.65.79
14 80.5.154.95
14 81.10.80.75
14 82.224.40.111
14 86.17.117.193
15 196.218.42.134
15 201.19.134.99
15 212.200.185.213
15 217.171.180.249
15 218.208.196.224
15 222.124.101.183
15 80.134.70.222
15 85.160.97.238
15 88.232.120.183
16 200.188.254.9
16 200.52.193.236
16 212.118.15.140
16 81.192.124.52
16 83.14.145.170
16 85.138.71.91
16 87.207.16.154
16 89.113.75.141
17 61.196.234.202
17 82.89.37.29
17 86.135.231.183
18 80.232.249.45
18 82.114.184.206
18 88.101.26.210
19 163.121.149.170
19 194.29.137.41
19 194.44.45.13
19 195.242.99.125
19 196.202.14.244
19 196.218.117.135
19 202.158.121.223
19 81.67.245.180
19 84.255.141.132
20 200.52.193.229
20 219.83.5.20
20 88.229.128.50
20 89.245.120.136
21 196.218.143.124
21 203.130.201.196
21 63.170.84.176
21 66.249.72.173
21 72.14.207.191
21 81.192.135.224
21 82.66.227.150
21 84.29.1.151
22 155.143.244.17
22 195.207.101.112
22 202.153.240.168
22 61.94.125.143
22 85.101.146.161
23 124.106.151.75
23 88.149.99.7
24 82.77.27.129
24 88.16.34.231
25 160.39.145.94
25 202.153.240.70
25 216.125.127.12
26 196.205.97.92
26 200.104.157.183
26 202.163.117.8
26 213.180.127.198
26 60.50.95.39
26 85.71.230.49
27 194.29.137.52
27 195.189.142.249
27 201.226.162.206
27 210.6.13.208
27 81.203.41.204
27 86.90.238.96
28 193.0.240.121
28 212.76.37.150
28 89.120.133.44
29 125.162.66.116
29 74.53.121.131
30 203.222.202.121
30 213.39.219.81
30 71.109.116.122
31 222.124.143.18
31 89.34.87.91
33 193.0.240.113
33 201.9.175.242
33 212.71.37.101
33 70.68.249.239
33 81.77.85.207
34 195.229.236.215
34 86.123.142.128
35 72.49.255.217
35 85.31.137.11
36 193.231.17.50
36 202.69.97.206
36 90.156.29.82
37 77.122.158.251
37 89.40.138.184
38 121.52.52.6
38 203.218.71.132
38 82.167.71.189
39 213.17.10.87
40 196.218.145.82
40 201.22.94.226
40 206.73.210.65
40 86.9.66.1
41 152.78.243.248
42 201.220.93.84
42 210.5.121.190
43 196.204.241.250
43 196.218.89.213
44 196.218.96.82
46 84.56.103.77
48 125.212.148.112
48 41.251.69.199
49 83.203.134.84
50 213.119.151.116
50 80.133.209.50
52 81.38.15.124
53 195.245.232.26
54 88.0.63.179
57 82.201.222.144
57 83.131.27.137
57 84.226.41.129
61 129.215.149.96
64 195.113.227.31
65 198.150.36.49
65 61.102.87.80
71 84.56.109.139
73 82.216.54.222
76 196.218.136.202
76 87.118.157.79
77 89.35.90.211
78 59.127.203.49
79 81.10.35.77
81 82.148.97.68
82 213.171.62.94
84 84.36.132.189
104 213.6.215.214
108 213.51.9.184
108 41.250.0.35
110 83.41.58.76
125 84.22.2.55
132 87.209.11.249
155 196.218.142.212
165 195.242.99.84
176 200.73.225.104
190 62.135.105.86
2946 195.242.99.102
server:/#
Does that look normal to you? Because I read somewhere that you should allow no more then 30 connections per IP. But most are taking much more then that.
I'm currently using MySQL 4.1.12 for Windows 2003, and I need to know how much possible connections can MySQL achieve? I'm currently around 650. I'm having 4 new servers online, and that will bring my total concurrent connections to 1000+.
how high it can go?
I currently have a dedicated server with the following specs:
Celeron 2.6ghz
2gb ram
100mbit connection
the cpu load is always under 0.7, and I always have at least 400mb of free ram.
The site takes about 5-10 seconds to load a test page with just a single word on it. When I type netstat -n | grep :80 | wc -l
I get around 1100-1200 connections. I get about 130k page views per day.
My site is about 95% static html, it has about 150 images per page. How can I speed up my site?
Here are my apache httpd.conf settings:
Timeout - 100
KeepAlive - on
KeepAliveTimeout - 12
StartServers - 48
MinSpareServers - 32
MaxSpareServers - 64
MaxClients - 1500
MaxRequestsPerChild - 1000000
I notice that most hosting have limit of mySQL connections.
If the max mySQL connections is 50 and I run a forum on this hosting,about how many people can visit my website at one time?