Linux Rate-Limiting of an ADSL LinkLinux Rate-Limiting of an ADSL Link
After great pain I’ve got tc working on some Linux routers. The difficulty with limiting an ADSL link is that the ADSL modem has significant buffers and the link between[...]
Category: Networking
Redundancy in Network InfrastructureRedundancy in Network Infrastructure
It’s generally accepted that certain things need redundancy. RAID is generally regarded as essential for every server except for the corner case of compute clusters where a few nodes can[...]
Fixing the Correct Network BottleneckFixing the Correct Network Bottleneck
The latest news in the Australian IT industry is the new National Broadband Network (NBN) plan [1]. It will involve rolling out Fiber To The Home for 90% of the[...]
Bridging and RedundancyBridging and Redundancy
I’ve been working on a redundant wireless network for a client. The network has two sites that have pairs of links (primary and backup) which have dedicated wireless hardware (not[...]
Gmail and Anti-SpamGmail and Anti-Spam
I have just received an email with a question about SE Linux that was re-sent due to the first attempt being blocked by my anti-spam measures. I use the rfc-ignorant.org[...]
The National Cost of Slow Internet AccessThe National Cost of Slow Internet Access
Australia has slow Internet access when compared to other first-world countries. The costs of hosting servers are larger and the cost of residential access is greater with smaller limits. I[...]
JabberJabber
I’ve just been setting up jabber. I followed the advice from System Monitoring on setting up ejabberd [1]. I had previously tried the default jabber server but couldn’t get it[...]
RPC and SE LinuxRPC and SE Linux
One ongoing problem with TCP networking is the combination of RPC services and port based services on the same host. If you have an RPC service that uses a port[...]
Switches and CablesSwitches and Cables
I’ve just read an amusing series of blog posts about bad wiring [1]. I’ve seen my share of wiring horror in the past. There are some easy ways of minimising[...]
New Net ConnectionsNew Net Connections
On Thursday my new InterNode ADSL2+ service was connected [1]. I needed to get a connection with a larger download cap and a better upload speed because one of my[...]