I have 2 stacks of Dell N3048 switches. I upgraded one of them on the weekend from 6.2.7.2 to 6.3.0.56 and found that two of my BGP sessions didn’t come up any more – after establishing and receiving the routes the BGP session would cease with this logged: <191> May 9 07:57:07 level14-stack-5 BGP[BGP Protocol]: bgptcp.c(653) 15582 […]
Monthly Archives: May 2016
Blocking WordPress Pingback Verification DDoS
Recently one of the websites I host has come under a few reasonably sized DDoS attacks. The attacker has been (mis)using a WordPress feature, pingback verfications. The attacker sends requests to WordPress sites that have this feature enabled, the WordPress sites then send a HTTP request to the target site to verify the pingback. If […]
pfSense 2.3 – IPSEC + OpenBGPD Dropouts
A while ago I upgraded one of my pfSense servers to 2.3. After I left it running for a while I noticed all of my IPSEC tunnels dropped out and never re-established – restarting the IPSEC service didn’t fix it and the only way I could fix it was rebooting the server. After doing some […]
Barracuda Web Filter and Logstash
I use a Barracuda Web Filter 410 vX. While looking around on the web I couldn’t find any filters that did exactly what I wanted so I created some. The filters will parse both logs from the web interface as well as the access log. Here is an example of the fields that are grok’ed […]