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1
vote
4answers
2k views

How can I calculate the 95-percentile bandwidth usage of a network device?

My provider is billing my bandwidth using the 95-percentile method. I know what it is in principle (take measurements, throw the top 5% away and use the remaining highest as result). The question ...
0
votes
1answer
59 views

Firewall traffic routing when visiting a specific website

I've got an odd question/request, here's what it is. We have a block of 5 public static IP addresses and there's a website that they are requesting that we try and set up so that when we visit it ...
0
votes
1answer
300 views

Best way to log internet traffic for office network via remote IP

We have a network of about 40 machines running either Win XP or 7 in our office via LAN switches into 1 x Netgear Router (WNDR3700). We have noticed recently that our local network has been added to ...
0
votes
1answer
254 views

How to know why server traffic is used and what is using it? (windows os)

I have a VPS on which I have Windows Server 2008 R2 installed. My monthly traffic is near 100 Gigabytes per month, and I don't have heavy sites on it (no download center, no movies, just text and ...
6
votes
2answers
418 views

Detecting Slashdot effect in nginx

Is there a way I can make Nginx to notify me if hits from a referrer goes beyond a threshold? e.g If my website is featured at Slashdot and all of sudden I have 2K hits coming in an hour I want to be ...
-4
votes
1answer
489 views

Sudden increase in outgoing traffic

My server is witnessing a sudden increase in traffic. Consistently there is a 200mb outgoing traffic every hour. This is not my web traffic. I am running centos OS and completely new to server ...
2
votes
3answers
191 views

iptables intercept local traffic

I hope someone can help me out with a somewhat simple task. I'm trying to redirect a client in my router through my desktop PC, so I can dump the traffic and analyze it (its potential source of ...
0
votes
1answer
87 views

Application to monitor traffic spikes on cloud server?

I was wondering if anybody knew of any software (preferably free if possible) that monitors server traffic for spikes? Something that, say, might send out notifications via email or anything for that ...
1
vote
1answer
96 views

Redirect traffic per domain on cisco 2901 [closed]

I have 2 internet interfaces on my cisco, and i want to redirect the traffic depending of the domain. for example. Interface 1 - youtube, facebook, browsing, etc. Interface 2 - Cloud services, mail, ...
2
votes
2answers
713 views

How can i get the outbound traffic per ip on a 2901 Cisco router?

What i need is to identify the internal source address using X amount of outbound traffic, and where the traffic is going (a domain or ip) Currently, i have configured an "ip accounting" on my ...
0
votes
4answers
82 views

What would be a quick fix in case of server downtime due to sudden high traffic?

Let's consider a scenario like below: A small web blog build based on LAMP stack and deployed on a shared hosting. Suddenly it becomes popular in one day and it gets million hits per day. Since the ...
1
vote
3answers
74 views

Traffic statistic for the executed programs

Some user launches a set of programs. I need to get statistic about traffic for the programs executed by these user. But not summary for this user, but for each program executed by it separately. ...
4
votes
3answers
957 views

will heavy network traffic affect other connections on HP ProCurve V1810-48G?

I have a HP ProCurve V1810-48G switch with a few servers running Citrix XenServer connected to it (everything in one rack). The switch is almost in its default configuration (no VLAN, no port ...
2
votes
1answer
154 views

Traffic statistics with iptables for passive FTP?

Basic traffic statistics with iptables are easy. One creates a rule with no target, e.g. iptables -I INPUT -p tcp --dport 80 Then, e.g. after uploading some data via http, one can read the counters ...
4
votes
3answers
549 views

Thousands of visits a day from untraceable traffic to website - Serious issue

At the end of January we noticed a spike in traffic to what JetPack stats says was home/archive page and what Google was classifying as going to /gaming/ which is an archive list in WordPress. This ...
0
votes
1answer
316 views

traffic priority using iptables

I have set up 4 VLANs with ids 100,200,300,400 on raw interface eth0.Now i wanted to prioritise the traffic that will be flowing on these interfaces.I think so,i can use iptables to add QoS rules to ...
-2
votes
1answer
272 views

block outbound traffic on hosting server, get alert on attempt to outbound attempt

So i want to block all unwanted out-bound traffic , specially traffic from unwarranted allowed ports both TCP and UDP and also get a email alert if any script or app tries to contact outbound port. ...
11
votes
4answers
330 views

How to play traffic against a shadow network?

Sorry if this is a newb question... I've heard stories of Netflix and Twitter being able to duplicate web traffic amongst two separate infrastructures: one is the authoritative/trusted one that goes ...
2
votes
1answer
880 views

Transmit rate decreases when using both Intel NIC 10G ports

I'm using the Intel 82599EB 10G NIC on a server running RHEL6. I ran a program where packets are generated at high rates. The NIC was previously installed on another PC where I was able to generate ...
0
votes
1answer
442 views

linode server bandwidth

I am ready to deploy my startup on the web so i would like to start small and get a VPS from linode as i see many good reviews and see how its going... the thing is that on their website they state: ...
0
votes
2answers
80 views

Large photo sharing service. Where to start [closed]

I'm sorry if this post is too vague but I don't even know what topics to start looking at. I need a server that has the ability to share large amounts of data with potentially very high traffic, and ...
3
votes
2answers
247 views

Is it just me or is my node down?

I find the www.doj.me very useful. I am looking for something like that but specifically for BGP Nodes. I want to write a script that tells the users if our Internet backbone is down, if if yes which ...
1
vote
1answer
341 views

Traffic from inside my network going to non-existent IP address inside my network, captured by router logs

I have a setup with RouterB sitting behind RouterA. RouterA sets RouterB's IP address to a public static IP 108.x.y.z, which it has been given in a block of addresses by the ISP. In RouterA's logs, I ...
0
votes
1answer
259 views

iptraf shows excessively high traffic, switch says almost no traffic

I have a weird problem with traffic here. My server is connected via 100mbit to a netgear switch. Now sometimes when I look at the traffic on the server using iptraf it reports in excess of ...
2
votes
2answers
272 views

What's the most simple proxy that can log traffic to a file?

we found a new service that could be quite useful to monitor what is happening on our servers and in our applications. Problem is that it is SaaS, so we can't just install the tool on our servers, but ...
0
votes
1answer
886 views

How can i route Postfix through a socks proxy?

I have a mail server that uses postfix to relay all the outbound mail through Gmail's smtp servers. Now I have another internet provider and this one is through a SOCKS proxy connection. How can I ...
0
votes
2answers
192 views

database for storing network traffic

I am developing a software to monitor network traffic and I need a database server that would be very fast in storing and querying packet header fields. I know there is a .pcap file format, but it is ...
1
vote
1answer
170 views

How to redirect traffic with Apache and Dlink 524T ?

I would like to redirect all LAN http traffic to my Apache server (which is located temporarily on my laptop ). The basic idea is that every user who connects to the network and tries to connect to a ...
2
votes
1answer
327 views

One terabyte of video served per hour - network limits?

Suppose in a peak hour there are 100,000 users that want to watch a video and that on average they consume 10 megabytes per video view. Might be more, might be less. For simplicity, let's say 1 ...
-1
votes
2answers
222 views

20 000 000 hits; simple PHP/MySQL server using NGINX [closed]

I am hosting a big campaign that is going to launch tomorrow. The expected avg. number of visits on the first day is +200 000 users. Assuming everyone is going to visit 5 pages on avg., this makes 1 ...
2
votes
2answers
738 views

tc prio qdisc for priorization of mysql traffic

I am struggling with tc prio qdisc for a few hours now. I have read the lartc Documentation, Examples and HowTos, but this whole thing is kinda new for me and somewhat confusing :) So this is my ...
1
vote
5answers
1k views

Fancy graphing for network traffic

I'm currently looking for a solution that would allow me to easily graph traffic on a network. Basically what I'm looking for is anything that could actively provide graphs/charts/colors etc. for our ...
2
votes
0answers
87 views

High traffic windows server configuration [closed]

I'm running a large website with 400.000+ visitors a day and currently setting up a new server environment (one web, and one db server). I would love to hear how Jeff and Joel has setup their Web and ...
0
votes
1answer
110 views

Large amount of traffic incoming. Preparation tips

Looking for any tips on improving performance on the server level as my client will be getting some heavy traffic in the next few days. Using a 1and1 cloud vps and increased the memory pretty high on ...
0
votes
2answers
1k views

Why is my TP-LINK wireless access point continuously generating traffic to a strange ip (ssdp?)

I just plugged in a couple tp-link wirless access points and found that while they work fine, I am now seeing traffic going from their internal ip's to a 239.255.255.250 which is nothing on my ...
0
votes
2answers
61 views

I need help w/iptable rules

Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere anywhere The above 'ACCEPT'-line is quiet confusing to me. ...
1
vote
1answer
91 views

Can a server generate traffic without load?

On the server I'm building my app, I have access to the cli. The administrator says that the server I'm working on is used to generate a lot of traffic, in order to flood another server. Lately, I ...
0
votes
2answers
536 views

fedora default traffic monitor tool

On a fedora server i have access using a ssh connection. As a regular user, how can I see what traffic is involved into the server? I don't have root rights, and I'll like to learn from the default ...
0
votes
1answer
80 views

why there is more than 60Gb incoming traffics on my eth0? [closed]

when i run nload -m , i find there is more than 60Gb incoming traffics on my eth0 , but no outgoing. i want to know is it a bug of nload or other possible reason ? thanks!
1
vote
3answers
623 views

Separating dynamic and static content on high traffic website

I am trying to increase capacity for my website, which is growing beyond what my current web server is able to handle. The site hosts on a dedicated web server (Litespeed), and a dedicated database ...
0
votes
1answer
507 views

Track torrent traffic in shorewall

I use shorewall to configure my firewall. Is there anyway to track torrent traffic using shorewall accounting?
1
vote
2answers
587 views

Counting traffic to destination MAC address using ebtables/iptables

I would like to be able to count the number of bytes going to a given MAC address using iptables or ebtables or some other linux utility. I have tried looking at the byte counts in ebtables but they ...
1
vote
3answers
2k views

CentOS monitoring traffic on port

I am looking for a tool to monitor traffic on some ports of a CentOS server. On this server each service runs on a port from 3000 to 3050 and I would like to compare traffic consumption on these ...
0
votes
1answer
2k views

How to monitor internet traffic on a Linksys E3000 router [closed]

I just got optical fiber installed in my place which gives me great download speeds. Now my ISP has a monthly download limit of 120GB, after that I gotta pay overages. Now my setup is like this: ...
0
votes
1answer
130 views

Quickly Routing Web Traffic From 1 Web Server to Another

We need a solution to route web traffic from 1 web server to another. We have 2 dedicated Windows 2008 Servers with our hosting company. 1st server is our main web server and the 2nd is a back-up ...
1
vote
1answer
161 views

ipvs based lvs system, is there going to be very high load on the front server?

there are 4 servers with the same hardware configurations, and a ipvs based lvs system is constructed on these 4 servers using NAT. my question is simple: will there be very high load on the front ...
2
votes
1answer
536 views

Is it possible to estimate the max number of users can access my website, based on the server configuration? [closed]

I have a dedicated server with windows server 2008 and I uploading there a website, I want an estimate number about how many concurrent users can access the website before it crash. Is that ...
0
votes
2answers
8k views

How to route network traffic of a host via another host?

I'm not the System Administrator of our corporate network, but I've got two Linux workstations (hosts A and B) with root access to both. Both hosts can see each other fine (ssh, ping, etc works from ...
1
vote
1answer
304 views

What is causing the huge network traffic?

I have a virtual machine hosted by Hyper-V, in a physical server provided by Hetzner. The physical server has Windows 2008 R2 Server, and the virual machine has Windows 7 Pro 32-bit. The virtual ...
0
votes
2answers
226 views

Forwarding web traffic from DMZ web server to non-DMZ web server

Kind of an odd situation. I have a web server in a DMZ in one building, and another web server in a different building -- not available to be put in the DMZ. I was wondering if it's possible to have ...