I am experiencing some delays on my trading computer. The trading computer is pulling in realtime price data. I am fairly confident that it is not my office computer. I am connecting to the...
This is a question about the traceability of MAC adresses beyond their immediate router/gateway.
I've been wondering how far beyond a router a LAN computer's MAC address is broadcast and/or...
Hi
I am a sys admin with about 60 users and 7 servers. We have recently replaced our swithces with managed gigabit 3com switches.
Someone on the network is uploading MASSIVE amounts of...
Hi,
i try to sniff some multicast pakets i send to to port 10000 udp, i disabled all multicast filters and
igmp filters on HP Procurve 2626, so the switch should flood the pakets out of all...
We have Internet Bandwidth of 2 Mbps for our compnay but every now and then the internet bandwidth gets chocked and either we need to restart the firewall or router.
We need a good mon...
I have a unique issue that I can't resolve and need some expert help. I currently have my domain controller attached to a dell powervault 220 via scsi. The drives are 10k rpm drives and curr...
1.) Internet
have a 30mbps pipe to Internet and have a report from the provider that in a 5 minute time span:
5 minute input rate 9320000 bits/sec, 939 packets/sec
5 minute output rate 191...
In wireshark it show that a few of my machines have traffice to a domain controller that is not in the domain any more. it gererates traffice on nbns protocol, what causes this and how can ...
I have a large collection of packets i've been sniffing... the issue is there is a lot of data from various connections, etc.
I wanted to find out if it was possible to search the actual pa...
Hi,
I ran a capture to a mirrored port on my system to capture all traffic. Afterwards I used the 'Statistics option to see the endpoint list for Ipv4. I believe this gave me an avg/bytes ...
Yesterday my office experienced a power outage that lasted roughly 2 hours. Although I was able to gracefully shutdown my servers, most of our network computers are set to reboot upon power f...
Hi all,
I'm looking for some advice on how to best analyze my network, either by using free tools, purchased tools, or even outsourcing this to a company specializing in this. We do not wan...
Experts:
I have a Firewall/Router, a 3COM 4200G Switch, a Linksys Hub and a Dell Workstation. I have a firewall/router connected to this managed switch that supports port mirroring. I need he...
Someone caused a network loop and all workstatons and servers became unuseable at a customer site. There was a message in the system tray of each workstation and server that said duplicate IP ...
How do i do an IOS upgrade on a cisco 6509 (wth SUP 720 ) , 1811, 7513, 1801
Hi,
My ADSL connection has been getting dteadily worse for the past 4-5 weeks. I did a tracert to Google see what was going out and I had numberous timeouts all the way from my ISP to Goog...
I need to install some software that will help me monitor my network.
I have heard of some expensive solutions but I am wondering if there are any freebies out there.
I need to be able...
My network consists of a LAN with 40 users, 50 VPN connections, 1 DNS/DHCP Server running Server 2003, 1 Exchange Server running Exchange 2003, 1 Microsoft SQL 2000 Server. I have had it all ...
Site 1 and Site 2 are connected by a 10mps Fibre link
I am monitor the Cisco 2900 switch port that links directly to the fibre (Via SPAN) with wireshark and a laptop.
Over a 5 mins peri...
I need to create a list of available IP addresses in a certain range and I was told nmap was a good tool to use. Unfortunately, I've never used nmap before and I can't seem to make it do exact...
Hi,
I've run into a problem that is driving me crazy and I can't seem to find anyone here that can help either so I'm trying to change directions. I'm looking for suggestions on monitoring s...
I have a cisco 3725 router and cisco SDM 2.5. On the interface status I have a box that says "Bandwidth Usage" and it has a bar chart next to it and a percent next to that. This is not the s...
Let me start by saying I am a beginner with cisco routers, I am studying for my CCNA, and just got ahold of a Cisco 2811 router. It has a 4 port HWIC card in it. Like I said I am studying for ...
We are looking for a bandwidth analyzer tool to measure the amount of SQL server traffic going in and out of our main server, which is running SBS 2003 SP2. We thought MRTG would give us what...
HI everyone!
i've seen on a machine in my lan that generate traffic in tcp or udp mode in this way:
port source 1020 - 1030 ( various) to cds16.iad9.llnw.net (and similar can change cds numb...
