Trouble installing workshop mods on ubuntu server

Doc_ODoc_O Join Date: 2016-03-11 Member: 214114Members

my ubuntu server seems to be unable to install any mods from the workshop (see screenshot). Even if I omit the "-mods" command line parameter it can't even download the UWE Extension. What am I missing here?
Any help much appreciated.



  • GhoulofGSG9GhoulofGSG9 Join Date: 2013-03-31 Member: 184566Members, Super Administrators, Forum Admins, Forum Moderators, NS2 Developer, NS2 Playtester, Squad Five Blue, Squad Five Silver, Reinforced - Supporter, WC 2013 - Supporter, Pistachionauts
    Based on error 77 means something seems to be wrong with your SSL CA files.
  • Doc_ODoc_O Join Date: 2016-03-11 Member: 214114Members
    edited March 2018
    It appears to affect only the server though, as curl itself works fine:


    Do you know where ns2 reads the ssl ca cert path from? Environment variable?

    This is what I get when I run curl -v on the url that the server tries to download the mods from:


    Everything seems to be fine with my ssl certificates.

  • Karasu_TenguKarasu_Tengu RU Join Date: 2014-11-22 Member: 199764Members
    I have the same issue!!!! Fully update my Ubuntu Server.
  • Karasu_TenguKarasu_Tengu RU Join Date: 2014-11-22 Member: 199764Members
  • Karasu_TenguKarasu_Tengu RU Join Date: 2014-11-22 Member: 199764Members
    tnx UWE, i will never play nsl from now. I really want to train new commands, but i can't do it. del this game.
  • NintendowsNintendows Join Date: 2016-11-07 Member: 223716Members, Squad Five Blue
    No issues here on my ubuntu server. Thanks UWE, now I have to keep playing this game and having fun.
  • NintendowsNintendows Join Date: 2016-11-07 Member: 223716Members, Squad Five Blue
  • .trixX..trixX. Budapest Join Date: 2007-10-11 Member: 62605Members
    edited April 2019
    Same issue. I followed the instructions here:

    When launching the server with x64/linux_server, i get the following error in console:
    [ 2.204] Main : Error: Error installing mod '"UWE Extension"(4241b84e)' (download failed, error 77 '', url '')

    wget and curl can resolve the URL without any problem, only ns2 fails.
    ns2server@ns2:~/server1$ curl -v
    * Trying
    * Connected to ( port 443 (#0)
    * found 148 certificates in /etc/ssl/certs/ca-certificates.crt
    * found 592 certificates in /etc/ssl/certs
    * ALPN, offering http/1.1
    * SSL connection using TLS1.2 / ECDHE_ECDSA_AES_256_GCM_SHA384
    * server certificate verification OK
    * server certificate status verification SKIPPED
    * common name: (matched)
    * server certificate expiration date OK
    * server certificate activation date OK
    * certificate public key: EC
    * certificate version: #3
    * subject: C=US,ST=Massachusetts,L=Cambridge,O=Akamai Technologies\, Inc.,
    * start date: Thu, 18 Oct 2018 00:00:00 GMT
    * expire date: Fri, 18 Oct 2019 12:00:00 GMT
    * issuer: C=US,O=DigiCert Inc,CN=DigiCert ECC Secure Server CA
    * compression: NULL
    * ALPN, server accepted to use http/1.1
    > GET /ugc/941711257965574338/9B175609D5EAA9D7010F4D44AE34CFD6AE40A9D9/ HTTP/1.1
    > Host:
    > User-Agent: curl/7.47.0
    > Accept: */*
    < HTTP/1.1 200 OK
    < Content-Length: 3252
    < Content-Type: application/octet-stream
    < Content-MD5: w/h1wXRNjQRKNCxL6kO2gw==
    < Last-Modified: Thu, 15 Nov 2018 09:01:34 GMT
    < Accept-Ranges: bytes
    < ETag: "0x8D64AD8F18CF5F9"
    < Server: Windows-Azure-Blob/1.0 Microsoft-HTTPAPI/2.0
    < x-ms-request-id: 14f8c57f-e01e-0111-0fc1-7cd063000000
    < x-ms-version: 2017-04-17
    < x-ms-lease-status: unlocked
    < x-ms-lease-state: available
    < x-ms-blob-type: BlockBlob
    < Content-Disposition: inline; filename*=UTF-8'';
    < x-ms-server-encrypted: true
    < Access-Control-Allow-Origin: *
    < Date: Fri, 12 Apr 2019 13:58:12 GMT
    < Connection: keep-alive

    Answer from discord:

    >Duck\ on\ Venus_01/12/2019
    I finally found what's going wrong.
    It does is some problem related with CA.
    I met this issue because I was calling the server_linux outside the x64 folder.
    When initializing, libcurl will check your CWD for a valid CA bundle file (cacert.pem). By default, ns2server ships one cacert.pem file in x64 folder. So if you are calling the server binary inside x64 folder, it will be fine. But if you calling the server binary outside x64 folder, and there is no valid cacert.pem file under your current working directory, the libcurl will fail to load the CA bundle, and when downloading something from HTTPS link, "cURL error (77): Problem with the SSL CA cert" shows up.
    To solve it, either invoke server_linux from x64 folder, where has a CA bundle file cacert.pem, or to copy cacert.pem to your CWD.
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