Re: [External] Re: uPRF strict more

2021-09-30 Thread Andrew Smith
In Ciscoland, you do have to explicitly state that the default route is eligible for URPF verification, otherwise you'll get unexpected traffic drops. ip verify unicast source reachable-via any allow-default And yes, it's main purpose is for implementing source-based remotely-triggered blackhole

Re: RIP: Bill Manning

2020-01-27 Thread Andrew Smith
Sad to hear about Bill. I also began my career at a small ISP in Houston where we also had a T1 to SESQUINET, and Bill was already a legend to us Jr. Sysadmins in town in 1995/96. -Andrew On Mon, Jan 27, 2020 at 2:36 PM Brett Watson wrote: > I was saddened to see this yesterday, that Bill Mann

Re: ISP Job

2019-09-23 Thread Andrew Smith
http://www.wispa.org/Directories/Find-a-WISP On Mon, Sep 23, 2019 at 3:03 AM David Ratkay wrote: > I have been looking to work at an ISP for a long time now. I live in > Northern Indiana in the US and there seems to not be much opportunities to > work for an ISP in this region. Any recommendati

Re: Predicting TCP throughput

2015-05-27 Thread Andrew Smith
You need to account for window size as well. You should also account for the details of the specific implementation of the TCP stack you are dealing with if you truly need a deterministic result. On Wed, May 27, 2015 at 8:15 PM, Glen Kent wrote: > Hi, > > I am looking at deterministic ways (perh

Re: Measuring DNS Performance & Graphing Logs

2015-05-20 Thread Andrew Smith
Smokeping (http://oss.oetiker.ch/smokeping/) can graph DNS response latency via dig. ThousandEyes (https://www.thousandeyes.com/) has some commercial options for monitoring DNS server responsiveness, and zone performance from different vantage points throughout the globe. On Tue, May 19, 2015 a