> How can I dispute one of my questions having had been marked as off-topic?


The [help pages](http://serverfault.com/help/reopen-questions) offer a number of approaches (emphasis mine):

> ... If you see a question and you disagree with the stated reason of its closure, you should **first try to edit the question to improve it** as much as possible. **Read the close notice and any comments carefully** to address concerns raised there. Closed questions that receive edits within the first 5 days of closure are automatically put into a review queue to be considered for reopening.

> Additionally, you can:

> 1. **Leave a comment on the question itself** calling for it to be reopened. Be detailed: explain why the question shouldn't have been closed. Be constructive: name-calling is as likely to drive folks away as it is win them to your cause. Remember, anyone on the site with at least 3,000 reputation points can vote to reopen a question - even if a moderator closed it.
> 2. Be sure that you've **read the close notice** and any comments on the question so you can **address any concerns** raised there. Addressing the concerns often means editing the post, which any user may do.
> 3. **Flag the question** for moderator attention. Again, explain why it should be reopened. There is more than one moderator, and moderators do reconsider their decisions.

Asking for clarification on Meta typically also attracts the attention from our active community members and moderators and I have since moved your question to [SuperUser](https://superuser.com/questions/1044993/ping-resolving-to-strange-address), as you requested in a comment.