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Could it be packets are arriving in incorrect order and therefore some overhead is required to put them back in correct order? G.

Thanks Burtsbees!

Install Getif a free SNMP tool on windows ... it's quite easy to use and you will probably understand what it's all about You find it at http://www.wtcs.org/snmp4tpc/getif.htm you can also find many mib files for common devices on that page Point it to the IP of the device that has SNMP enabled...

You could install linux on the 2 router PC's the functionality you request is readily available in the kernel. (it's called eql) have a look at http://en.wikibooks.org/wiki/Linux_Networking_How-To/EQL_-_multiple_line_traffic_equaliser which explains how to do it. CU G.

Steve, another possibility would be to use a low TTL value on the DNS A record, and when needed change the IP address to the one of the backup line... Of course this requires some manual work when the primary line fails. A working solution could be built around some dynamic DNS service (Dyndns...

there is a client side GPO extention if the clients are Windows (XP) http://technet.microsoft.com/en-us/library/cc737101.aspx

you HAVE to point to your internal DNS for AD stuff to work correctly. On the internal DNS server you define a "forwarder" pointing to the ISP DNS. In this way clients always use internal resolution first, if the internal DNS has no answer say for www.tek-tips.com, the forwarder will talk to ISP...

the point is that you need to define the zone "x" on the mydomain.com nameserver. (using an NS record) the NS record on the mydomain.com server has to point to your ubuntu dns server (where you define the hosts belonging to the x.mydomain.com) in this way any client on the internet wanting to...

www.getdropbox.com G.

just for fun and to prove you don't need a tool. If this is on a windows box, in a command prompt try: for /l %i in (1,1,254) do @ping 192.168.1.%i -n 1 -w 100|findstr /I Reply >>active-ips.txt a simple loop from 1 to 254, with step 1 you ping the corresponding addresses and filter the ones...

Burt, Thanks for pointing this out... As I said, it's been a long time since I've done some networking (well at least long in terms compared to ICT evolution speed ;-) I guess, by now such provisions in routers will be quite commons given the abundance of DDOS attacks. Anyway, it shows again...

Once you have the PID, you can check in taskmanager which process is actually using the port on your system in real time. It could be a know port that is used by a trojan, or what have you ... If the PID is not shown in your default taskmanger view you must add the column via the menus G.

Maybe this can help in the debugging... http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094702.shtml

If this is on XP clients, try "netstat -ano" in a command prompt It will list the process ID of process using the port G.

You could probably abuse NAP-NAC for this http://technet.microsoft.com/en-us/library/dd125393.aspx normally used to check health of client PC (al security patches applied? Antivirus up to date etc...) The check is done by the NAP agent on the PC, but this agent merely runs a script that you...

if your switch is using SNMP, you could send a traps when the cable is diconnected This will work even if the server/PC is switched off. The NIC stays powered on (at least on modern hardware and with powermanagement not configured to shut the NIC down) As soon as the cable is pulled, the...

Hi there, well it's been a long time since I've done some "networking" so I'm not sure about what I say here. Just want to point out some things ... First of all is your router configured to send ICMP redirect messages? (since the only one who can know something is wrong is the router, he must...

if you use "nmap" it has an option to "fingerprint" i.e. *try* to discover what sort of device it is...

it could be a restriction of the graphical interface ... have you tried to login in a terminal? (ctrl+alt+F1) Login as root, then create a non root user for logging in via GUI G.

What OS is on the Laptop? If it's XP it needs SP2 for WPA access to work (out of the box) if it's SP1 you need to install Windows WPA Client from Microsoft's website ... http://support.microsoft.com/kb/815485/en-us G.