Posted in Uncategorized on Aug 2nd, 2023
If you’re like me and care about IPv6 and want an analog telephone adapter for your BBS, you want a Cisco ATA 191/192 instead of a Cisco SPA 121/122. I forget why I bought the SPA 122 after I bought an ATA 191 and needed more ports, I guess to compare them or the 122 […]
Posted in Uncategorized on May 30th, 2016
My colleague Matthew gave a presentation about bare metal provisioning servers at Facebook on IPv6-only networks at SREcon last month. He discusses the entire process from why we went v6-only, selection of DHCP server and network boot loaders, through installing CentOS on hosts, and all of the gotchas along the way. By audience survey it […]
Posted in Uncategorized on May 2nd, 2016
It turns out my SuperMicro A1SAI boards made a fucking liar out of me. I bitched and moaned it was 2016 and they didn’t support UEFI PXE booting despite supporting UEFI, but they do. I just didn’t know where to look. Under “PCIe/PCI/PNP Configuration” in boot setup, the “Launch Storage OpROM Policy” and “Launch Network OpROM […]
Posted in Uncategorized on Apr 9th, 2016
If you have Mellanox ConnectX-3 or ConnectX-4 NICs in your servers, I discovered it’s possible to do IPv6 OS installations via PXE. FlexBoot is their on-board PXE implementation that ships on their NICs and it’s based on iPXE. It turns out that as of FlexBoot version 3.4.718 from January 2016 they’ve added beta IPv6 support. […]
Posted in Uncategorized on Mar 28th, 2016
I wanted a new Avoton motherboard for my OpenIndiana home NAS with lots of on-board SATA so I could use the PCIe slot for a 10-gigabit NIC. I needed seven SATA ports, six for the data disks and one for the OS drive. The standard mini-ITX configuration seems to max out at six, and I […]
Posted in Uncategorized on Mar 26th, 2016
The Anaconda 19 (now v21) installer in RHEL 7 / CentOS 7 is a great improvement over Anaconda 13 that was used in CentOS 6. Among other fixes it was completely overhauled along the way. One thing lacking in CentOS 6 was the ability to perform an automatic kickstart installation over an IPv6-only network. […]
Posted in Uncategorized on Jul 1st, 2015
June was such an exciting month and the good news over summer keeps getting better: People finally wise up and take down the Confederate flag (the “rebel flag” where I grew up) The US Supreme Court allows gay marriage (whether or not they hijacked diplomacy is another thing) ESA’s Philae comet lander makes contact with Rosetta […]
Posted in Uncategorized on Oct 21st, 2010
If you’re like me, you have a home LAN filled with various contraptions, computers, mobile devices and the ubiquitous server in the closet. Usually there’s no DNS zone containing your home devices, if anything, maybe a static /etc/hosts entry on your desktop to give a short hostname to your closet server. Otherwise, people just use […]
Posted in Uncategorized on Sep 30th, 2010
I discovered today there’s a way to bring IPv6 connectivity to your iPhone, even if you don’t have v6 wifi nor v6 cellular data. There’s a Cisco AnyConnect client for iPhone which speaks SSL VPN (TLS/DTLS) to an ASA. The release notes say “Access to internal IPv4 and IPv6 network resources”. I take this to […]
Posted in Uncategorized on Sep 27th, 2010
My host’s home network is behind NAT, has no 6to4 connectivity and the router squashes IP protocol 41 (6in4). Normally in this situation I’d fire up a Teredo tunnel, but here it’s pretty unreliable. My control traffic to Microsoft’s Teredo server goes to Singapore, and who knows where my closest Teredo relays are. After some […]
