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16
votes
5answers
22k views

how i can identify which process is making UDP traffic on linux?

my machine is continously making udp dns traffic request. what i need to know is the PID of the process generating this traffic. The normal way in TCP connection is to use netstat/lsof and get the ...
0
votes
2answers
43 views

Transatlantic Ping respond times [closed]

Not sure if this the the right place to ask the question. But has anyone had any experience with ping response times or knows of an good to average response time for transatlantic traffic? we have an ...
0
votes
1answer
35 views

What's the catch for unlimited bandwidth for VPS? [closed]

I need to choose some VPS packages, so I started to google a lot of VPS companies. Typically, a VPS package should have a limited bandwidth(or say traffic, data transfer), such as 2TB, 3TB, etc. Then ...
2
votes
0answers
58 views

How do iptables work with NFQ in terms of traffic shaping in snort?

I'm trying to understand how iptables and NFQ work together with snort. The reason that I ask this is because from what I understand snort can be set to IPS via NFQ but if you have iptables there ...
1
vote
2answers
1k views

KVM: All network traffic to one guest (firewall)

I am currently using a VMWare ESXi 5.5 server for my virtualisation. The network setup is like this: PFSense firewall is the center of it all and connected to: LAN Network (physical NIC 1 assigned by ...
-1
votes
1answer
16 views

Random spikes of high ingress traffic. What could be the cause? [closed]

I understand that this is rather a generic question but wanted to see if you all could offer some good feedback. Our business has three locations, one in the West Coast, two in the East Coast. Our ...
-3
votes
1answer
27 views

Logging traffic in a file? [closed]

today I'm looking for a tool that allows me to log any traffic that goes in and out. It would be perfect if it would store that data in text files on the server. Does anyone have a tool like this? ...
0
votes
0answers
35 views

Using net_cls with tc to shape ingress

I've successfully set up egress shaping using tc and net_cls, but am having a lot of trouble doing the same for ingress. I've tried using the basic tc ingress qdisc with a filter as well as using IFB ...
0
votes
1answer
106 views

Traffic shaping linux upload issue

Im currently working on a traffic shaping in linux. We have a client connected to a server running nat and dhcp. What we want to do is limit both the upload and download speed of the client/clients. ...
0
votes
0answers
82 views

MySQL production server experiencing high traffic from debian-sys-maint user

I am running a MySQL server on Debian 7 in a production environment. I recently (more or less accidentally) took a look into the server stats that can be shown in phpMyAdmin. I saw that the MySQL ...
0
votes
1answer
279 views

Getting lots of traffic from russia to an unpublished site

I am currently building a website. Currently nobody knows about it but it is already reachable for testing purposes. Now I saw, that I get a lot of traffic from russia (Its a german website hosted on ...
1
vote
1answer
43 views

How increase classes in HTB? [closed]

I am trying to setup a traffic shaping by HTB and tc. I have 70,000 users and I want to control the bandwidth of each user, so I create 70000 classes, and assign each ip address to a class by ip ...
2
votes
2answers
82 views

Is this reverse proxy configuration possible

I will first try to describe the problem I have. Let's say I have two different http servers running on two different ports behind firewall on my local machine: SERVER1: http://localhost:8001 ...
0
votes
1answer
28 views

Apache Load Balancing And Network traffic Flow

I am using apache load balancing to load balance web requests to various other nodes, the problem I am having is during uploads and downloads, all the traffic is also being routed through my load ...
22
votes
4answers
87k views

How to filter http traffic in Wireshark?

I suspect my server has a huge load of http requests from its clients. I want to measure the volume of http traffic. How can I do it with Wireshark? Or probably there is an alternative solution using ...
3
votes
4answers
2k views

How do I get the number of (currently) established TCP connections for a specific port?

How do I get the number of (currently) established TCP connections for a specific port? I have managed to get counters for traffic working by doing i.e for outgoing RTMP. iptables -N $CHAIN ...
-2
votes
1answer
60 views

How to monitor Windows Server process Internet activity? [closed]

Does anyone know a good tool for Windows Servers that would show breakdown of Internet traffic by processes and users? I know there are many Microsoft tools (such as process explorer) but does ...
0
votes
1answer
55 views

Monitor ppp0 traffic usage with Linux

Hey I'm developing a 3G connected device with a raspberry Pi. My mobile provider allows me to use 50 MB/month. This device will be installed somewhere nobody can have physically access to. My concern ...
0
votes
4answers
2k views

Meaning of numbers on Watchguard Traffic Monitor

When looking at Traffic Monitor, you will see columns of numbers. However not all of them are apparent on what they are for. Unfortunately I don't have enough reputation to post images but I'll try ...
1
vote
2answers
10k 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
0answers
64 views

Redirect Default Gateway Traffic in Linux to File

I am trying to troubleshoot one of my linux servers (ubuntu server). Therefore I want to intercept all traffic that is sent to the default gateway and then write it to a file: preferably some kind of ...
-2
votes
2answers
51 views

How much traffic does a Ubuntu server cause for updates? [closed]

Does anybody have some numbers on how much traffic/month a ubuntu server causes if automatic updates are enabled (just for fetching the apt sources and the packages)? I have a small box which is ...
-2
votes
1answer
2k views

How to route only specific openVPN traffic through a openVPN based on IP filtering of the destination? [closed]

I noticed a DNS proxy service I saw utilizes openvpn and tunnels supposedly only DNS traffic through the VPN which masks the users of the VPN's geolocation and allows the users system to use their ...
1
vote
2answers
201 views

Traffic redirecting with linux? (Man in the middle)

I have got the following scenario: I have a Linux box with two NICs and all network traffic comes in trough one NIC and goes out to the other one. So basically I'm already the man in the middle. But ...
0
votes
1answer
31 views

what does JYADXW mean as a HTTP verb?

Some jerk attacked my server, and I was reading the logs, when I saw "JYADXW" where the HTTP verb GET/POST/OPTIONS normally reside. What is this request? what does it mean? malicious IP Here - - ...
0
votes
0answers
166 views

Inbound traffic equals outbound traffic

I'm trying to monitor inbound and outbound traffic using Cacti on Ubuntu Server 14.04.1. I've got it up and running, but the reported data is wrong. When I run 'ifconfig' I get the following: lo ...
0
votes
1answer
168 views

Network traffic simulation with one computer

I have a Linux box with a gigabit Ethernet interface in a local network. With this single computer, I need to simulate HTTP traffic like if it was coming from 20 machines (hence with 20 different IP ...
0
votes
0answers
147 views

Monitor traffic on ports with Cacti

This seems like a basic question, but i haven't found any solution yet. Recently I've installed Cacti for interface traffic monitoring. That works fine, but I would like to see these graphs for used ...
0
votes
1answer
39 views

Iptables and counters

I'm trying to use iptables counters with munin to monitor traffic of hosts on my local subnet. For each host I set up a rule like this: iptables -I OUTPUT -d $ip This should count the packets going ...
-1
votes
2answers
310 views

Block incoming traffic from unresolved IP address

How can I block all the incoming traffic from unresolved IP addresses? I am using CentOS with WHM/cPanel installed. I am getting huge junk traffic and 95% is from unresolved IP addresses and only 5% ...
0
votes
0answers
85 views

Squid not routing traffic, missing domain

I have a squid3 proxy setup and would like to route it's traffic although when I try and connect I get this error: The following error was encountered while trying to retrieve the URL: ...
1
vote
2answers
318 views

Traffic increase causes VPS to crash due to RAM utilisation

I have a VPS which runs multiple Opencart sites and for the most part performs the task very well. Spec: CPU GenuineIntel, Intel(R) Xeon(R) CPU E5-2665 0 @ 2.40GHz Version Parallels Plesk Panel ...
5
votes
7answers
419 views

Real-time website traffic monitoring for operations teams

Working on medium sized websites we've always built our own real-time traffic graphing solutions and displayed those on a big screen mission control style so that if traffic starts to climb, load ...
3
votes
1answer
243 views

linux tc htb bandwidth ceil being ignored and giving improper results

I'm setting up some htb packet queues like so: tc qdisc add dev eth0 root handle 10: htb tc qdisc add dev eth1 root handle 10: htb tc class add dev eth0 parent 10: classid 10:1012 htb rate 750kbps ...
1
vote
1answer
298 views

How to optimize prefork mpm for high traffic?

I have allocated 5GB of memory for Apache processes. While basing on the fact that each Apache process consume in average 42.5MB I've set the following on my server (while calculating as if each ...
0
votes
1answer
27 views

Email traffic redirect

We have old email servers from our systems from years ago that are no longer around, in our application code are hard coded references to our old email servers. The code cannot be changed easily. Can ...
0
votes
0answers
72 views

netperf issue on RHEL

Please help me with netperf issue. When I issued the following command on server (Red Hat Enterprise Linux), and got the following outputs. Tried to research online, but not much help. I was expecting ...
0
votes
3answers
71 views

Architecting a web server hosting mixed small and large (100MB+) static content [closed]

I have the challenge of hosting about 200-1000 mp3 files, all in the 100MB+ size range. Furthermore, there are some smaller RSS files, and some smaller JPG files. All this is static content, no PHP, ...
2
votes
2answers
892 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 ...
0
votes
0answers
163 views

Trouble using net_cls control group in tandem with tc for packet filtering

I'm having some trouble limiting network bandwidth using the net_cls control group in conjunction with the linux traffic controller (tc). I think I might just be confused about how I'm writing the ...
1
vote
0answers
185 views

how to manage bandwidth and amount of traffic over pptp?

I'm running Ubuntu 12.04.4 and using it as internet server , file server and printer server. The problem is that my company manager decided to limit bandwidth and the amount of data per user per ...
0
votes
1answer
271 views

Port level traffic monitoring (with graphs)

I'm looking to monitor traffic (incoming, outgoing and total monthly) on a few ports (mostly TCP) and I've done a ton of Googling around and everything leads to software I either can't manage to use, ...
30
votes
3answers
2k views

ISP broadcasting all IP-packets, so I can see traffic of other clients from ISP

Recently I wondered why my router shows a constant downstream of 5 MBit/s, while I am downloading almost no data. I discovered the "packet logging" function of my router, with which I was able to log ...
14
votes
6answers
503 views

First days online : how not to kill your site

Suppose you have this fancy new site, with lots of data (like big images), and you're about to put it online. If you do "too much" publicity, during the first days, the site will be overwhelmed with ...
1
vote
1answer
128 views

How can you investigate a daily traffic drain?

Running Amazon EC2 instance, t3.large tier. And observing interesting situation: Every night (UTC+1 midnight) the same NetworkOut jump occurs. What are my options to investigate it? The EC2 runs ...
4
votes
3answers
1k 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 ...
1
vote
1answer
2k views

fortigate traffic packets not logged

Ciao, we use Fortigate device since years and now we need to check bandwidth usage per protocol and this is is not possible. We made this test: 1) all policy Logging Options - Log all Sessions 2) ...
0
votes
1answer
142 views

Redirect all VPS traffic to another VPS

is there any way to redirect all traffic from one VPS to another one? Example, domain is parked with IP 1.1.1.1 but website, smtp, game server, teamspeak server is hosted on 8.8.8.8.. (Ofcourse I ...
1
vote
0answers
101 views

Varnish & iFrames - Each iFrame counts as a hit = poor performance?

I have a large Wordpress site (600-900 consistent users at all times) and about 6 months ago we setup Varnish. Our config uses 5GB cache and is stored in memory. When the site hits around 1500-2000 ...
4
votes
3answers
617 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 ...