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Leap Day
by Jay R. Ashworth 01 Mar '24

01 Mar '24

Late, just saw the posting on BlueSky: In the wake of NTP inventor Dave Mills' death, probably the next ranking topchimer is NIST's Judah Levine, and the New York Times interviewed him about why we have leap years, which makes sense; all the other news outlets had to make do with lower-ranking (and less well spoken) "time experts" (I'm lookin' at you, NPR...) https://www.nytimes.com/2024/02/29/science/leap-day-easter.html Cheers, -- jra -- Jay R. Ashworth Baylink jra(a)baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://www.bcp38.info 2000 Land Rover DII St Petersburg FL USA BCP38: Ask For It By Name! +1 727 647 1274

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List of GMAIL DNS *clients*?
by bzs＠theworld.com 29 Feb '24

29 Feb '24

Occasionally one of our log analyzers will block gmail DNS requests causing bounces when gmail claims our domain(s) are not authenticated, they can't get to our SPF etc. I'd like to whitelist them but does anyone know the list of IP blocks I need? -- -Barry Shein Software Tool & Die | bzs(a)TheWorld.com | http://www.TheWorld.com Purveyors to the Trade | Voice: +1 617-STD-WRLD | 800-THE-WRLD The World: Since 1989 | A Public Information Utility | *oo*

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IPv6 connectivity to mx[1-4].smtp.goog.
by Marco Davids (Private) 27 Feb '24

27 Feb '24

Hi, At https://internet.nl we're seeing IPv6 connection issues on TCP port 25 (SMTP) to mx[1-4].smtp.goog. Either 100% DROP (so no TCP connection) or ⅔ failure to setup connection. Further testing seems to confirm the problem is bigger and on Google's side. So, this fails: echo 'quit' | nc -6 -w 3 mx1.smtp.goog. 25 and this works: echo 'quit' | nc -4 -w 3 mx1.smtp.goog. 25 (on MacOS use -G instead of -w) Is anyone else seeing this? Any idea what is causing this? -- Marco

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starlink ixp peering progress
by Dave Taht 27 Feb '24

27 Feb '24

One of the things I learned today was that starlink has published an extensive guide as to how existing BGP AS holders can peer with them to get better service. https://starlink-enterprise-guide.readme.io/docs/peering-with-starlink I am curious if there is a way to see how many have peered already, how many they could actually peer with?, and progress over time since inception.... what would be the right tools for that? This is pretty impressive for peering so far: https://www.peeringdb.com/net/18747 Is there a better email list to discuss ixp stuff? -- https://blog.cerowrt.org/post/2024_predictions/ Dave Täht CSO, LibreQos

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Why are paper LOAs still used?
by Seth Mattinen 27 Feb '24

27 Feb '24

Why do companies still insist on, or deploy new systems that rely on paper LOA for IP and ASN resources? How can this be considered more trustworthy than RIR based IRR records? And I'm not even talking about old companies, I have a situation right now where a VPS provider I'm using will no longer use IRR and only accepts new paper LOAs. In the year 2024. I don't understand how anyone can go backwards like that. ~Seth

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BGP Monitoring
by Ray Orsini 27 Feb '24

27 Feb '24

What tools are you using to monitor BGP announcements and route changes? [OIT Website]<https://www.oit.co/> Ray Orsini Chief Executive Officer OIT, LLC [cid:915068ae-ac24-488b-95e0-65fd40ea5afb] 305.967.6756 x1009<tel:305.967.6756%20x1009> | [cid:6f566813-2e6f-4b77-86fb-6dcf7b370a8a] 305.571.6272 [cid:3bcb9fcf-e0d4-43db-afd5-f0d92d993db5] ray(a)oit.co<mailto:ray@oit.co> | [https://www.oit.co] <https://www.oit.co/> www.oit.co<https://www.oit.co/> [cid:de964c1d-0360-48dc-99f4-11b48385b44b] oit.co/ray [Facebook]<https://go.oit.co/facebook> [LinkedIn]<https://go.oit.co/linkedin> [Twitter]<https://go.oit.co/twitter> [YouTube]<https://go.oit.co/youtube> Join the OITVOIP Family at the Right of Boom Event in Las Vegas, NV on March 6th - 8th Register Today! https://www.rightofboom.com/<https://www.rightofboom.com/>

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Verizon Business Contact
by Richard Laager 26 Feb '24

26 Feb '24

Can someone from Verizon Business please contact me? It appears that your network is losing traffic from Verizon Wireless (e.g. 63.59.39.232, 63.56.37.4, or 63.59.67.68) to me (AS33362, e.g. to 69.89.207.16). Note that 63.59.166.100 -> 69.89.207.16 was successfully (around 2023-11-27). This breaks email between us and it's been MONTHS of VZW getting nowhere. Based on some traceroutes (on 2023-11-27 and again just now), the working ones go through 140.222.234.223 (0.ae10.GW7.CHI13.ALTER.NET) while the broken ones stop at 140.222.234.221 (0.ae9.GW7.CHI13.ALTER.NET) -- Richard Laager Wikstrom Telephone Company

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Re: TFTP over anycast
by Dan Sneddon 26 Feb '24

26 Feb '24

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Network chatter generator
by Brandon Martin 26 Feb '24

26 Feb '24

Before I go to the trouble of making one myself, does anybody happen to know of a pre-canned program to generate realistic and scalable amounts of broadcast/broad-multicast network background "chatter" seen on typical consumer and business networks? This would be things like lots of ARP traffic to/from various sources/destinations within a subnet, SSDP, MDNS-SD, SMB browser traffic, DHCP requests, etc.? Ideally, said tool would have knobs to control the amount of traffic and whether a given type of traffic is present. This is mostly for torture testing "IoT" type devices by exposing them to lots of diverse, essentially nonsense traffic that they're likely to see in a real environment. -- Brandon Martin

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Re: Network chatter generator
by G 25 Feb '24

25 Feb '24

Here's some tools that I've used to stress test gear over the years. You may or may not find some of them useful for your use case: (1) T50 - be *really* careful with this one: - Source: https://gitlab.com/fredericopissarra/t50 (2) Yersina (can be used for DHCP stress testing) - Source: https://github.com/tomac/yersinia - Useful info for DHCP-specific stress testing: https://www.amirootyet.com/post/dhcp-dos-attack-with-yersinia-in-kali/ (3) wrk - L7 endpoint load testing - I typically use an Ansible playbook to generate artificial load from multiple source systems, which also allows you to consolidate the stdout reporting from each system - Source: https://github.com/wg/wrk -- -G On 2024-02-23 17:33, Brandon Martin wrote: > Before I go to the trouble of making one myself, does anybody happen to > know of a pre-canned program to generate realistic and scalable amounts > of broadcast/broad-multicast network background "chatter" seen on > typical consumer and business networks? This would be things like lots > of ARP traffic to/from various sources/destinations within a subnet, > SSDP, MDNS-SD, SMB browser traffic, DHCP requests, etc.? > > Ideally, said tool would have knobs to control the amount of traffic > and whether a given type of traffic is present. > > This is mostly for torture testing "IoT" type devices by exposing them > to lots of diverse, essentially nonsense traffic that they're likely to > see in a real environment. > > -- > Brandon Martin

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