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Phil's Blog

The thoughts and ramblings of an Engineer

Author: Phil Lavin

I’m an Engineer, working for Vonage. I write about stuff that interests me - primarily Networks, Software Engineering, Linux and VoIP. It exists in the hope that someone may learn from my thoughts and ramblings. I'm on GitHub! I'm also currently fairly active on Twitter and LinkedIn.
Yealink T58A
28 August, 2020 Blog

A tale of VoIP, NAT and some confused Engineers

Foreword NAT and PAT, in their many forms, are so common these days that almost all of CloudCall’s customers use

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AWS Logo
14 August, 2020 Blog

The trials and tribulations of running statically linked 32 bit binaries in AWS Lambda

Foreword AWS Lambda is absolutely wonderful. The ability to deploy code and have it triggered by a variety of sources

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Juniper SRX 1500
18 April, 2020 Blog

Juniper SRX: Clamp TCP MSS on a single interface

JunOS has some system wide settings for TCP MSS. These are limited to all TCP, IPSec VPN and GRE. Sometimes

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Juniper MX204
18 April, 2020 Blog

Juniper MX: Simple static VXLAN configuration

On most VXLAN deployments, you’ll want to be using EVPN to distribute MAC addresses between devices. However, if you’re doing

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HPE ProLiant Gen8 G1610T
3 April, 2020 Blog

Linux: Kill stuck NFS process (kill -9 doesn’t work)

Apparently kill -9 always works… except when it doesn’t. It also so seems that 99% of the time, when it

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Wordpress Logo
16 July, 2019 Blog

WordPress plugin: Wikipedia extract tooltip v1.3

I initially wrote this plugin back in 2011. I then apparently released v1.1 and v1.2. Largely due to forgetting how

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15 July, 2019 Blog

So you’re thinking of applying to APNIC?

Having recently gone through the APNIC application process (and been accepted as a member), I thought it worthwhile writing about

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Juniper SRX 345
25 May, 2019 Blog

Juniper SRX: IPSec VPN sourcing from loopback interface in a VRF

Probably not an overly common setup but you’ll inevitably become frustrated if you try it. As per this Juniper PR,

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Juniper MX 80
24 May, 2019 Blog

Juniper JunOS: Difference between rib-groups and instance-import

Both rib-groups and instance-import allow you to selectively (or non-selectively) import routes into one VRF from another. I won’t go

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Juniper QFX 5110
12 April, 2019 Blog

Juniper MX204 – Enabling 100G ports

This was far more difficult than it should be so it’s worth writing down… First, check the Juniper Port Checker to

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Recent Blog Posts

  • Yealink T58AA tale of VoIP, NAT and some confused Engineers
    28 August, 2020
  • AWS LogoThe trials and tribulations of running statically linked 32 bit binaries in AWS Lambda
    14 August, 2020
  • Juniper SRX 1500Juniper SRX: Clamp TCP MSS on a single interface
    18 April, 2020
  • Juniper MX204Juniper MX: Simple static VXLAN configuration
    18 April, 2020
  • HPE ProLiant Gen8 G1610TLinux: Kill stuck NFS process (kill -9 doesn’t work)
    3 April, 2020
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