Ah, forgot to update! Turns out, nmap has something like this built in. nmap -sO -sO: IP protocol scan So there's the transmitter. On the receiver side, a tcpdump might work with protocol # extraction via bash script or something. Not a slick integrated package, but something at least. --Bart On 05/05/2014 06:06 PM, Rob Salsgiver wrote:
Don't think these do it exactly as you indicated, but they might get you to the ultimate goal of testing a flaky connection....
./paping ./hping or ./hping3
Rob
-----Original Message----- From: PSDR [mailto:psdr-bounces@hamwan.org] On Behalf Of Bart Kus Sent: Saturday, May 03, 2014 10:34 AM To: Puget Sound Data Ring Subject: [HamWAN PSDR] Request for Software - IP Protocol Filtering Measurement
Hi,
During some cell site work last night, I seem to have experienced Comcast dropping packets from point A to point B simply based on the fact that their IP protocol was GRE (IP protocol 47). I also found some posts on the Internet that claim Comcast wishes to charge more money to transport GRE packets. I'm not sure if this is true, or if I made a mistake somehow in my traffic handling. Therefore...
Would someone be willing to create software instruments to measure this claim in general? I'd like to see a transmitter and a receiver piece of software that can run on Linux to generate and record a sweep of IP packets carrying all possible protocol numbers (0-255). The protocol payloads themselves don't need to be well-formatted, just the protocol number in the IP header needs to be set. Your software will be considered successful if it measures 100% of all protocols as available over an unfiltered (eg: LAN) link.
The results of such a measurement would be useful in gauging the ISP quality of any given carrier. It seems we're moving closer to Selective Protocol Service Providers (SPSP) and away from true Internet Service Providers (ISP) if this GRE finding turns out to be right.
--Bart
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