Category: Linux

  • Postfix + maildrop + recipient_delimiter

    I suddenly noticed issues with Postfix not accepting e-mails that are tagged (“user+TAG@fqdn”) anymore. Even though it always had. Postfix main.cfg: recipient_delimiter = + Log snippet: Apr 16 13:07:52 vm-dns-mail postfix/pipe[6119]: 55D1C2005E4: to=<[email protected]>, relay=maildrop, delay=0.06, delays=0.01/0/0/0.05, dsn=5.1.1, status=bounced (user unknown. Command output: Invalid user specified. ) Tried to find what’s wrong in MySQL, change the delimiter, Debug…

  • Home made TimeMachine

    This. Used my Raspberry Pi, with an USB disk as TimeMachine. Another disk as NAS/storage. It’s just quite slow… Not sure whether it’s my WiFi or RPi that can’t keep up. But for now, it’s working.

  • Fuck you, internet.

    For a few years I ran my own public DNS server. I liked it, great experience, I could easily connect all my host to a central and fast DNS, I avoided all those nasty ISPs who filter their DNS, and it was fast (not Google fast, but fast — I actually think Google DNS didn’t…

  • First 5 Minutes Troubleshooting A Server

    First 5 Minutes Troubleshooting A Server

    This.

  • OpenVPN: Can’t assign requested address

    For no clear reason, OpenVPN on Mac with Tunnelblick (any version, had this problem for a few years already) results in these kind of error messages (and refuses to connect): 2013-02-05 17:44:31 write UDPv4: Can’t assign requested address (code=49) 2013-02-05 17:44:33 write UDPv4: Can’t assign requested address (code=49) This seems to appear more often when…

  • Connect different LANs over openVPN

    I now own three Raspberry Pi’s. Using two of them (and my Guruplug as WiFi AP) I connected my new apartment with my old house (= parents) over VPN. This way I can access the printers/scanners and NAS at home. The 2 rPI’s are used as router (using a Macbook Air USB-to-Ethernet adapter as 2nd…

  • Defcon 18: Pwned By the owner

  • Gentoo & Samba hanging boot and refusing to start

    I recently took a server from for maintenance (PSU burned down) and quickly noticed it hung at boot (hangs at Samba starting). I went into interactive boot mode and skipped Samba. Thinking it was a networking issue (server has static IP & routing set up) which didn’t match my home network. Set up dhcp, changed…

  • Munin & Bind9_rndc

    2012/06/18-16:30:03 [28214] Error output from bind9_rndc: 2012/06/18-16:30:03 [28214] rndc: error: none:0: open: /etc/bind/rndc.key: permission denied 2012/06/18-16:30:03 [28214] rndc: could not load rndc configuration However, via command line (and user root) it works: /etc/munin/plugins # ./bind9_rndc query_recursion.value 0 query_success.value 80 query_nxrrset.value 17 query_requests.value 104 query_failure.value 0 query_duplicates.value 0 query_nonauth_answer.value 0 query_nxdomain.value 4 query_auth_answer.value 101 query_responses.value 104…