• 16 Posts
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Joined 10 months ago
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Cake day: December 17th, 2023

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  • Some surface-level info while I’m waiting for my kids to finish the evening ritual: No need for an extra IP or VPS. You can host them all on the same IP and machine, provided there aren’t any conflicting port assignments.

    In the DNS server, you can enter the various subdomains as CNAME pointing to the A record. The server-software is configured with which hostname it should operate as (For example, HTTP/1.1 has a Host-specification in the initial request, so that one server can host multiple domains on the same IP)

    It should be noted that mail servers are indicated by an MX-record. And mailservers should also have a TXT record (SPF record) as part of spam prevention - some SMTP servers query this to ensure that your e-mail actually comes from you and not from someone spoofing the domain.

    I used to have a zone file that did roughly what you’re trying to do, bit sadly I don’t have it anymore. But as you have DNS up and running, I’m sure you’ll be able to figure out the rest through checking some examples.

    I half-baked an example zone file for you. I haven’t tested it, though. It assumes the domain of blargh.com being hosted from an IP of 123.123.123.123:

    $TTL 86400
    @    IN    SOA   ns1.blargh.com. admin.blargh.com. (
                    2024102102 ; Serial (incremented)
                    3600       ; Refresh
                    1800       ; Retry
                    1209600    ; Expire
                    86400      ; Minimum TTL
    )
    
    ; Name servers
    @    IN    NS    ns1.blargh.com.
    @    IN    NS    ns2.blargh.com.
    
    ; A Records
    @            IN    A      123.123.123.123
    ns1          IN    A      123.123.123.123
    ns2          IN    A      123.123.123.123
    
    ; CNAME Records
    mail         IN    CNAME  blargh.com.
    mastodon     IN    CNAME  blargh.com.
    matrix       IN    CNAME  blargh.com.
    
    ; MX Records
    @            IN    MX     10 mail.blargh.com.
    
    ; TXT/SPF Record
    @            IN    TXT    "v=spf1 mx ~all"
    

    Oh, and some tips:

    • Do not enable SMTP-relay on your SMTP server. This opens you up to abuse, and you (probably) don’t need it.
    • Your DNS server should only talk to strangers about queries about your domain. Otherwise you might be part of a DNS amplification attack.
    • I have a personal preference for imap.blargh.com or pop3.blargh.com, combined with smtp.blargh.com, as it makes it easier to deduct the protocol, if you’re not supporting imap and pop3. I don’t think anyone else but me care, though.



  • My brother in law is like that. He’s been diagnosed with paranoid schizophrenia, and his drivers license has been suspended after an unrelated episode 10 years ago. He’s harmless, and perfectly capable of getting it unsuspended if he puts in some effort, but he can’t because:

    • His doctor is out to sabotage his life
    • Someone is tapping into his phone
    • This lady on the other side of town is stealing his mail
    • His PC had been bugged

    …allegedly.

    He sometimes takes his meds, but it’s rare. Those are the days when he’s out and about and reasonably normal.



  • IMPORTANT EDIT: It seems a lot has changed regarding how this is done. Amongst other things, CCNA can be taken online these days. If your system meets the requirements (windows and macos only, sadly), you don’t have to show up to a testing location. Outside of that, you find a testing location near you via the link posted further down.


    Most likely not. Cisco certs and their exams are administered by Cisco and not by normal educational institutions.

    However, some educational institutions might be able to run the exam. If you feel you know the material well enough, you can contact any of the certification places and have an exam.

    Technically, you don’t need to pass anything in advance to take the exam, but it helps to make sure you know the necessary material. On that note, if you’re into hardcopy study material, these books cover everything. They’re not as intimidating as they look, and they’re quite well written:

    Image

    More info about registering and finding a location here: https://www.cisco.com/site/us/en/learn/training-certifications/exams/registration.html

    Edit: Looks like Cisco is partnering with Pearsons now. You register online and pick the exam location





  • I’m tempted to say “no” to the first half, then “Yes, plenty” to the second half, on the basis that I’m good at faking it.

    I travel a lot for a living, so there are a lot of idle hours in hotel bars and airplanes, ripe for idle chitchat with random strangers, so I decided to start practicing my social skills, because they sure as hell need some exercise. What do I care, I’m never gonna meet them again anyway.

    Well, it turns out that
    a) Most people I encounter are just as bored as I
    b) Idle chitchat is easy after a few tries. I don’t think I’m fak8ng it anymore.
    c) Sometimes you do run into the same peo0le again on the other side of the of the world, and they’re happy to see you