diff --git a/.appveyor.yml b/.appveyor.yml
index 2c22b5d..27ca72d 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -135,13 +135,14 @@ build_script:
   - "[ -f ${HOME}/dlinstaller_env.sh ] && . ${HOME}/dlinstaller_env.sh || true"
   # all remaining deps after git-annex
   - python -m pip install -r requirements-devel.txt
-  # Add our private CA root certificate to certify
+
+  # Add our private CA root certificate to certify and change the hostname to match the certificate
   - cat /usr/lib/ssl/certs/ChristianMoenchCA.pem >> ~/venv3.9/lib/python3.9/site-packages/certifi/cacert.pem
+  - sudo hostname data.inm-icf.de
 
   # Check program versions and report
   - .appveyor/check_versions --warn-only ${ICF_PYTHON_VERSION} ${ICF_GIT_VERSION} ${ICF_GIT_ANNEX_VERSION}
 
-
 before_test:
   # simple call to see if datalad and git-annex are installed properly
   - datalad wtf
diff --git a/.appveyor/data/ssl-cert-snakeoil.crt b/.appveyor/data/ssl-cert-snakeoil.crt
index 29624e8..2762e84 100644
--- a/.appveyor/data/ssl-cert-snakeoil.crt
+++ b/.appveyor/data/ssl-cert-snakeoil.crt
@@ -1,23 +1,26 @@
 -----BEGIN CERTIFICATE-----
-MIID4jCCAsoCFHNmCbqAGy5fL82iuTDViFHbvgP3MA0GCSqGSIb3DQEBCwUAMIG2
-MQswCQYDVQQGEwJERTEMMAoGA1UECAwDTlJXMRAwDgYDVQQHDAdDb2xvZ25lMSIw
-IAYDVQQKDBlDaHJpc3RpYW4gTW9lbmNoIFNvZnR3YXJlMRQwEgYDVQQLDAtEZXZl
-bG9wbWVudDElMCMGA1UEAwwcQ2hyaXN0aWFuIE1vZW5jaCBEZXZlbG9wbWVudDEm
-MCQGCSqGSIb3DQEJARYXY2hyaXN0aWFuLm1vZW5jaEB3ZWIuZGUwHhcNMjMwNTMx
-MDYzOTMxWhcNMjUxMTE2MDYzOTMxWjCBozELMAkGA1UEBhMCREUxDDAKBgNVBAgM
-A05SVzEQMA4GA1UEBwwHSnVlbGljaDEgMB4GA1UECgwXUmVzZWFyY2ggQ2VudGVy
-IEp1ZWxpY2gxEDAOBgNVBAsMB0lOTS1JQ0YxGDAWBgNVBAMMD2RhdGEuaW5tLWlj
-Zi5kZTEmMCQGCSqGSIb3DQEJARYXY2hyaXN0aWFuLm1vZW5jaEB3ZWIuZGUwggEi
-MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC+s0vtWMI4C7jzZyQ1LwDPTMA4
-myJ2THC2/sxFpoTtmi+3dJ9hTFupJwoKeaB+/RnRPcsiuhvdfK8M58TnIRmGGrF6
-0AaJASQyZC3HSX6zPeVuC0UPmjlf6XkAeVdurCVkgRAAm/LluqoAMVMue6VLvagF
-4Er5trbM6TJJ78UemtycgpJoUucXO8VgEynudW2s497FvHYPm7RyKkbVAl4ud70v
-ltvwIeMgWw1GAa8rPnr4iSCTTklnafVg5zuKRnzABNDBJJu2uS66Yk2iiRPXJ2gc
-+68oLbLDxyoFjamDX1D91psi/7xMxuoM+i1FAR9zwEIP/dxYXZ7/xdieB9GLAgMB
-AAEwDQYJKoZIhvcNAQELBQADggEBAFQTa2AQIeo8v0cuyyKanOB9+xV2dTw+nI7Q
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-NceKZH+JyTZwU4n+F+6suW/TOIOEWDkohgYctIWqp4iitMGo6FaHKguxLP8UHwBW
-qV+soXSXf+94u37uPIOMTknthPFyJXvfPEUHIWjRn5lErFq8t62S/ekd0S8+u9ZX
-oLShl6L34cSGufuXxP0KbtSe0sqPq5OI/mqB6Kcifo0FRDooxobLzTPcty1PnMj5
-J7LGRmNQVkcqsiAPoY5FCRB7RKTDg74Qyh+zE1mRWqTThFboWmU=
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+HgYDVQQKDBdSZXNlYXJjaCBDZW50ZXIgSnVlbGljaDEQMA4GA1UECwwHSU5NLUlD
+RjEYMBYGA1UEAwwPZGF0YS5pbm0taWNmLmRlMIIBIjANBgkqhkiG9w0BAQEFAAOC
+AQ8AMIIBCgKCAQEAyU/rVULEz05xVwQfnpK33OX17ponuMWhKYldsenSkKb3gBjp
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+FN1klL9b2YLag6WbP6CFx8ziq5ojWfJB13oWmQIDAQABo4GMMIGJMAsGA1UdDwQE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 -----END CERTIFICATE-----
diff --git a/.appveyor/data/ssl-cert-snakeoil.key b/.appveyor/data/ssl-cert-snakeoil.key
index 8076a82..d2a9c6b 100644
--- a/.appveyor/data/ssl-cert-snakeoil.key
+++ b/.appveyor/data/ssl-cert-snakeoil.key
@@ -1,28 +1,28 @@
 -----BEGIN PRIVATE KEY-----
-MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQC+s0vtWMI4C7jz
-ZyQ1LwDPTMA4myJ2THC2/sxFpoTtmi+3dJ9hTFupJwoKeaB+/RnRPcsiuhvdfK8M
-58TnIRmGGrF60AaJASQyZC3HSX6zPeVuC0UPmjlf6XkAeVdurCVkgRAAm/LluqoA
-MVMue6VLvagF4Er5trbM6TJJ78UemtycgpJoUucXO8VgEynudW2s497FvHYPm7Ry
-KkbVAl4ud70vltvwIeMgWw1GAa8rPnr4iSCTTklnafVg5zuKRnzABNDBJJu2uS66
-Yk2iiRPXJ2gc+68oLbLDxyoFjamDX1D91psi/7xMxuoM+i1FAR9zwEIP/dxYXZ7/
-xdieB9GLAgMBAAECggEAVauy1oPjbM5HXoHdkE73bCmsyUFYcBDTKkK5fija2utD
-uIUZ/NoS66DwL9iIM8R8zrWWBpnZXt1evst4d+U01Dw1s1i1NuNeYY0Dy93Gn7uU
-0KUbd3DviZkXlRDuKHgJrGcWy09EBdSf/sop9l3x2l7vlwQ2aoyc/t1cjD69LYvZ
-SZBZr8DIq4cp4RpqRnPhb7xg3BsCKbUxZXFZXEqVwBBioAOL3xfFLsv6dAyuhgj5
-ADBgcgmr/NXDfdl8npZR47f+lOj3hBoihYViSv6HWFlFyV4R61KikCp3kgF/BaVP
-ryTTnoC7h44OQWMx8FcJp6k12vrG0KK7QnKeoopXMQKBgQDIUO/uIcvOlBRToLPU
-O2NcYimBn5+/1QL4MDl2PJbm/UVhOrPTAtFjmkGjpQZGMAbnfwEiu2eZQPiGhaWQ
-nvr/uXJ9t18qJZWmIK9Cs93qYUzToJw6yZfHRW58woJVzkTKF44kAG/94sorkP1o
-XqtNyiEx4B9qM6r5974XF4XVPwKBgQDzthK1ho3W5YyA5FvPWm6II6vfagEcgukM
-/pCbDehuP31+9Z2hw2PVZC2tunLgEAmWa8N+vD/zjMTMZrvzb28rNG4q7b4IHxAI
-qgwDHu+6byc8CLrUFwmv2xiqgpiLEVIPN32Rc7xMCWOFd4pQLminDPsheJs3qly9
-BPzygNj0tQKBgQCQp1H75s/kZ66eDWiPFCvWZNSQVJLp1osEat6z8WEPgUn+woNl
-F53ZjWVlJSB4wunZdi99w1M2qmJN0mkTHJso2+Q/wJGqP+XnR6cIRhc0z/rIwCzR
-jw5ZylvVICk6iW/HeGcevGojLwjLmTJFkkemLxb1i2FkMdeAF1VgG457xQKBgFic
-yh6wpuANJNI0teEl+2yKs9KPA4pvWvd7k+6c1vdHJIVGHyOTHLiZLTauxVgM3L+R
-vUpWflY6x8+eRxaTXPNzo97+BIuFZ9oOokF8PSQniDd+4Rd+rOoBGu3cgESIbrLT
-tVduondvLn134pWW2jxrLuCTrrRFwGSF7Mbr7HbFAoGAKrHL5ZOtcG/0O85btWW5
-otll5HqIi4i6jZrQYS/BV6v89BylTZw7k3Q/GbnwwKG3IJDwMEaF16S7e2s8JDyu
-HLptN5Nh+aOpLKN9B3TRiz/8DgqvK4DsPLRbeA7xxvRPCFdHqIfPMFLLyK9yy561
-kkcd4JtNGij87Vcx19HjFTA=
+MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDJT+tVQsTPTnFX
+BB+ekrfc5fXumie4xaEpiV2x6dKQpveAGOkvSHzJAEqCqN6k7ypwuLas5r08ikO7
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+mi47TabYb0FGN04l6CWCTVIaJamlxUD1EvZEkeqgwWAIfv7sRjvvG+Fgc/mNh4wE
+yTY+ldMUsike5xRH1u6ztx9g3fT0PVeu6KPH0GWDwD8+w6c2MJ89NzMtuQKBgQC/
++bOwPMTFueHPAtzS4sVs3wGPaISTdsRCEUwNC3yXftWjCA8+i7mPIA/LymX1cNyu
+JiDsTuUdRZzml99o9CiUUwKFLWipeMPR7ByHrHTu/nxBKPbU1VD6bWqX16ZoPSLq
+MVNxUnFLKV/o3ROIbgLXPRIOG0hMdQ/5H8TWyB9igQKBgQDLH8j/D2MJMykI9Blg
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+7jd5EBgwZIOwCmH3icUkiJILjeqHhINtpWkga6U4AlUZ2yzc6JNDjgW7MajDNHb+
+YUE3ua78lQKCXPSTFdYymtWpuA==
 -----END PRIVATE KEY-----