Page 2 of 2

Port probing and scanning with netcat

Netcat is built into most if not all Linux distributions. It is an incredibly useful tool for quick network tests: to see if a device is reachable or a service is running. Seeing a “Connection refused” in netcat is in itself already valuable information as it could indicate that the remote host is reachable, but the service just isn’t running.

Continue reading

Subnet calculator

As a first simple tool I’ve put up a basic IPv4 subnet calculator. It’s fully clientside and accepts the common input methods ( or An IPv6 one is also in the works.

Fixing “AH01630: client denied by server configuration”

When setting up Apache from scratch on a new server, and you create a new DocumentRoot for a new VirtualHost, you’ll often find yourself running into:

You don't have permission to access / on this server.
Continue reading

Taking a useful packet capture using tcpdump

When troubleshooting an issue on any device where network connectivity is impacted, a packet capture is still king. This is not to say every 403 Forbidden error needs to be examined in Wireshark, but when a user reports their browsing saying the connection was reset or a timeout was hit, it might be time to fire up tcpdump.

Continue reading
Newer posts »

Copyright © 2024 ForwardProxy

Theme by Anders NorenUp ↑