Until I can use the same software I use on my two computers, on a mobile phone, I don’t consider the “smart phone” to be a general purpose computing device. Paul Graham has a similar metric, he wants the device to be capable of hosting it’s own development environment. Graham, among many others, has done [...]
Tagged android, iphone, maemo, meego, n900, nokia, smart phoneI’m presenting a talk at the TLUG meeting in Pretoria tonight, on fiber optic networking. These meetings are open to the public. See the link for details.
Tagged fiber optic, presentation, TLUGShortly after my post revealing that RSAWeb (among others) provide hosting for known South African spammers, I got an email from their Technical Director, Mark Slingsby, asking how recent my lookups were1, and requesting me to name the offenders2 so that his sysadmin team can follow up. I replied with a detailed response, noting that [...]
Tagged fail, ispa, RSAWeb, spammersThis morning I read this article on MyBroadband about the ISPA “hall of shame” list of South African spammers, and conducted a quick (somewhat non-scientific) investigation to see where the mail servers for the domains provided on the ISPA list are hosted. After filtering out domains without MX records, MX records without valid A records, [...]
Tagged hosting, ispa, spammersDHCP can be used to set the interface MTU on end hosts using option 26. For example (with dnsmasq), to set the MTU of clients on the lan interface to 1400 bytes, use: dhcp-option=lan,26,1400 I’m using this to work around MTU issues caused by a tunnel. It seems to work well so far… no need [...]
Tagged dhcp, fragmentation, MSS, MTU, tunnelsIP sub-netting is one of the first things one learns about network administration. You have a /22, you want /24′s, 2 bits give you 4 sub-nets. Or you want one /24, so you break the /22 into two /24′s and a /23. Not rocket science. It’s the kind of thing you can do in your [...]
Tagged bgp, ddos, prefix hijack, python, subnettingI’ve been playing with BGP-based maps showing links between South African autonomous systems, on-and-off, for a long time. I always got stuck at the graph layout step and was never able to trick GraphViz into doing exactly what I wanted. When I re-visited this project one evening this week, I decided to generate a Dia [...]
Tagged bgp, dia, graphviz, ispmap, python, za internet mapLast week Thursday I registered a .COM domain with joker.com, a smaller registrar that I’ve been using for a few years. They accepted my credit card payment and I immediately configured a blogger.com hosted blog to use this domain. After three hours the delegation for the domain suddenly disappeared from the .COM zone, effectively taking [...]
Tagged .co.za, .com, dns, IS Labs, joker.com, registrar, registry, uniforumThe /16 route being announced by First National Bank’s new IPConnect ADSL-based consumer ISP, FNBCONNECT (AS37028) disappeared from the Internet Solutions (AS3741) local routing table somewhere between last week Wednesday (2009/08/12) and Friday (2009/08/14). It seems their transit via First National Bank’s own network went down. FNB, in turn, buys transit via IS and MTN [...]
Tagged bgp, fail, fnbconnect, IS, MTN Business, peering, SAIXAS37105 (NEOLOGY-AS) recently appeared in the BGP routing tables, announcing two /24 prefixes, with transit via Imperial Online. This is what Roelf Diedericks of Neology had to say about it: Neology supplies IAP services to ISP’s in the local market, this includes radius, billing and RealSoon(tm), ADSL IPConnect termination for multiple ISP’s. We will be [...]
Tagged ADSL, bgp, IPConnect, IS, IS Labs, Neology, split routing, telkom/etc/network/interfaces ARP bgp bind bugs Cisco 3560E debian dhcp dhcp3-client dhcpcd dns doc DPE ethernet fail fnbconnect home networking hosting hostname ICASA infraco IOS IS IS Labs ispa lasers linux mikrotik MTN Business Neology networkmanager peering phone-camera policy python routeros SAIX spammers telkom trouble-shooting vans verizon winbox Xen zimbabwe
