We have already talked about SIPExer, a console tool that is ideal for sending SIP packets to servers to run tests, check that a system is still alive, and 1000 other things.

This time, we have just learned that it has been updated to version 2.1.0, a very interesting release because it adds many advantages over the version we first got to know.

Here you can see an example of how it works, and you will see how useful it is (if you were not yet familiar with this tool):

For me, it is one of the essential tools in my day-to-day work.

Sending OPTIONS requests (a quick SIP ping to check whether the server is up)
Registration and unregistration with custom expiry values and contact URIs
Authentication with plain-text passwords or HA1, with hashing algorithms for authentication: MD5, SHA1, SHA256, SHA512-256, SHA512
Setting custom SIP headers
Template system to build SIP requests
Simulation of SIP calls at the signaling layer (INVITE-wait-BYE)
Option for late-offer SDP (late-offer)
Replying to requests received during SIP calls (e.g., OPTIONS keepalive messages)
Sending instant messages using SIP MESSAGE requests
Color output mode to make debugging easier
Support for multiple transport layers: IPv4 and IPv6, UDP, TCP, TLS and WebSocket (for WebRTC)
Sending SIP requests of any type (e.g., INFO, SUBSCRIBE, NOTIFY, etc.)
Self-call simulation: pre-registration, call to its own AoR, answer and hang-up
Two-user call simulation: registration of both, call from the first user to the second, answer and hang-up
Subscription session simulation: sending SUBSCRIBE and waiting for NOTIFY requests
Option to re-resolve the destination FQDN via DNS before each in-dialog request (UDP only)