I now have to move on to the question of Ethernet ports in relations to rack mount servers. I have just about ever question answered now. Now my question is about the connection to the web my server will use. Is it better to have a single or a dual Ethernet post?
I see a lot of duals. Here are some of the samples I have read when building my server.
2 x Intel® 82546GB Gigabit Ethernet Ports
Dual Onboard Gigabit Ethernet LAN Ports
Dual Intel® 82541GI Single-port Gigabit Ethernet Controller
Broadcom dual Gb NICs
Intel dual Gb NICs
Broadcom BCM5754, 10/100/1000Mbps
my server has 2 nics, how do I view them and their usage uptime etc in debian stable I wanna see if they are being used randomly (usage on both), or if it hasn't been already setup and I need to do it (found a tutorial on how to do this, but dont' wanna fix it, if it ain't broken)
Say I have my own office to start building out my own "mini" data center.
If I wanted a lot of bandwidth for the most reasonable cost, how do one go about buying bandwidth from various providers? What is Metro-Ethernet vs. say a DS3? I know there is Fractional DS3 (6 to 45mb/s) and then Ethernet services up to GigE. I'd rather not mess with BGP right now either.
If I am looking at 15-20mb/Sec of bandwidth, what would be a good route to go? My budget is about $1500/month for bandwidth and IP Addresses (I need 2 Full Class-C IP Spaces). I also want to be able to turn up speed as needed without a lot of hassle.
Is this a reasonable budget? And where would be a good place to start? Just call up like Level 3 or am I too small potatoes to even deal with?
What low-cost Gigabit Ethernet switch would you recommend for providing residential IP services to an apartment complex that is already prewired for copper Ethernet? My only real requirement is that is it a managed switch supporting QoS, capping, and has fiber uplinks.
I have inbuilt Ethernet card RTL8139D , but when i install RHEL 4 or 5 , Fedora version the Ethernet card diver not installed or ethernet card not installed but when i install suse linux it working fine without any problem so can any one tell me how to install lan card on Fedora or RHEL5.I have driver in CD but it not working with it.
yesterday the dc tech logged-in by ssh (root) cause we couldn't connect to the ftp box we keep our backup's (the new box couldnt connect to the ftp got time out) They fixed it.
Today i got a time out and after 2 reset and restaring of services the server was back again.Then i got this messages and it still coming (3 hours now i get 1 similar message per 5 second )
Code: Nov 4 12:31:20 gandalf kernel: martian source 217.20.117.1 from 127.0.0.239, on dev eth0 Nov 4 12:31:20 gandalf kernel: ll header: ff:ff:ff:ff:ff:ff:00:1a:4b:3a:7e:23:08:06 Nov 4 12:31:21 gandalf kernel: martian source 217.20.117.1 from 127.0.0.244, on dev eth0 Nov 4 12:31:21 gandalf kernel: ll header: ff:ff:ff:ff:ff:ff:00:1a:4b:3a:7e:23:08:06 Nov 4 12:31:22 gandalf kernel: martian source 217.20.117.1 from 127.0.0.252, on dev eth0 Nov 4 12:31:22 gandalf kernel: ll header: ff:ff:ff:ff:ff:ff:00:18:71:80:07:86:08:06 Nov 4 12:31:22 gandalf kernel: martian source 217.20.117.1 from 127.0.0.244, on dev eth0 Nov 4 12:31:22 gandalf kernel: ll header: ff:ff:ff:ff:ff:ff:00:1a:4b:3a:7e:23:08:06 Also the firewall stopped the port scanning from a server within the same dc.
I checked it on google and the explanation's varies but most say that is a problem of the router/switch or similar.
We're ready to setup 3-4 42U racks for servers and are in need of choosing Ethernet switches. What do you guys use and why?
I'm looked at Cisco switches, but lost in their product forest. I'm looked at Express 500, 2960 and 3750-E models. Is there any more difference (in exception of stacking, cli and hot-swap fan/psu) that I need to consider? Prices differentiate too much.
I'm also looked at Linksys/D-Link business products and they seems to have the same features as Cisco Express series, but only 50% cheaper.
After a previous uplinks issue, i'm never able to hit above 4Mbps of download speed to my home's cable broadband anymore. I have no idea whether it's because my partner capped my bandwidth from Switch 1, or his usage has increased such that it's affecting my traffic too. I can't be too concerned about it with him, as he's paying the bulk of the bandwidth costs.
For the whole rack, i'm not able to hit above 5Mbps accumulatively, and my normal bandwidth usage is only about 1-2Mbps.
So i'm thinking of getting another line for bandwidth directly from the datacentre to my Switch 3, perhaps starting from just 1-2Mbps only.
How will things improve? Just a silly thought, whether my total available bandwidth can now be 5Mbps + 2Mbps = 7Mbps.
We have a few CPanel servers, all with multiple NIC's. (2 Each)
We want to setup Eth0 to be the managment interface (ie. 72.2.24.x) We want to setup Eth1 to be the Shared / Exclusive IP Nic (ie. 67.69.141.x)
Here is the issue, Eth1 is on a totally different Vlan than Eth0.. thus, isolating DDOS attacks, and any other type of traffic concerns for managment.. But, it also has a different G/W as Eth0.
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.
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.
How 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.
WARNING: 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.
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,
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?
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?
