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    CentOS 7 - Proxy Server

    IT Discussion
    linux centos centos 7 proxy
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    • A
      Alex Sage
      last edited by

      Ping doesn't work ether 😞

      scottalanmillerS 1 Reply Last reply Reply Quote 0
      • A
        Alex Sage
        last edited by

        I can ping the proxy, so no issue there.....

        1 Reply Last reply Reply Quote 0
        • scottalanmillerS
          scottalanmiller @Alex Sage
          last edited by

          @anonymous said:

          Ping doesn't work ether 😞

          Ping doesn't work in what way? You said that you can ping the proxy, so it sounds like ping it working.

          A 1 Reply Last reply Reply Quote 0
          • A
            Alex Sage @scottalanmiller
            last edited by

            @scottalanmiller I just tried to ping google.com

            scottalanmillerS 1 Reply Last reply Reply Quote 0
            • scottalanmillerS
              scottalanmiller
              last edited by

              You are on IPv6? You have an IPv6 connection from your ISP?

              A 1 Reply Last reply Reply Quote 0
              • scottalanmillerS
                scottalanmiller @Alex Sage
                last edited by

                @anonymous said:

                @scottalanmiller I just tried to ping google.com

                But I thought that you put in an HTTP Proxy?

                A 1 Reply Last reply Reply Quote 0
                • A
                  Alex Sage @scottalanmiller
                  last edited by

                  @scottalanmiller I did.

                  scottalanmillerS 1 Reply Last reply Reply Quote 0
                  • scottalanmillerS
                    scottalanmiller @Alex Sage
                    last edited by

                    @anonymous said:

                    @scottalanmiller I did.

                    Then how would you ping it? Are you trying to ping it FROM the proxy?

                    1 Reply Last reply Reply Quote 0
                    • A
                      Alex Sage @scottalanmiller
                      last edited by

                      @scottalanmiller said:

                      You are on IPv6? You have an IPv6 connection from your ISP?

                      No. But isn't this a IPV6 address?

                      "Failed to connect to 2a02:2498:1:3d:5054:ff:fed3:e91a: Network is unreachable"

                      scottalanmillerS 1 Reply Last reply Reply Quote 0
                      • scottalanmillerS
                        scottalanmiller @Alex Sage
                        last edited by

                        @anonymous said:

                        @scottalanmiller said:

                        You are on IPv6? You have an IPv6 connection from your ISP?

                        No. But isn't this a IPV6 address?

                        "Failed to connect to 2a02:2498:1:3d:5054:ff:fed3:e91a: Network is unreachable"

                        Yes, so you have IPv6 being used somewhere. You need to get everything onto IPv4 if you want that to work 🙂

                        1 Reply Last reply Reply Quote 1
                        • scottalanmillerS
                          scottalanmiller
                          last edited by

                          Since that address would have to have come from DNS, I assume, then maybe the proxy things it is on IPv6 and is requesting AAAA records.

                          1 Reply Last reply Reply Quote 0
                          • A
                            Alex Sage
                            last edited by

                            I am assuming when the proxy is working correctly I will be able to ping google.com from this server.

                            scottalanmillerS 1 Reply Last reply Reply Quote 0
                            • scottalanmillerS
                              scottalanmiller @Alex Sage
                              last edited by

                              @anonymous said:

                              I am assuming when the proxy is working correctly I will be able to ping google.com from this server.

                              No, the purpose of using a web proxy is to block that, not allow it. You have no path for the ping to get to google.com since you just put in a proxy to block that.

                              1 Reply Last reply Reply Quote 1
                              • scottalanmillerS
                                scottalanmiller
                                last edited by

                                If you accidentally forgot to lock down your firewall and left the routes on your server, then ping would continue to work as before, but then a proxy would be pretty silly as it wouldn't be doing its job in most cases. Assuming you configured the firewall to block outbound traffic that doesn't come from the proxy server, there would be no route for a ICMP packet to take to get to the Internet since the server isn't on the Internet anymore.

                                1 Reply Last reply Reply Quote 0
                                • A
                                  Alex Sage
                                  last edited by

                                  So.....

                                  http_proxy=http://proxy_server_address:port
                                  

                                  Doesn't work

                                  http_proxy=http://proxy_server_address:port yum -y update
                                  

                                  Works 😕

                                  1 Reply Last reply Reply Quote 0
                                  • scottalanmillerS
                                    scottalanmiller
                                    last edited by

                                    I'm guessing you were not putting it into your profile or rc script to add it to your shell and were spawning a new shell without the proxy setting.

                                    A 1 Reply Last reply Reply Quote 1
                                    • A
                                      Alex Sage @scottalanmiller
                                      last edited by

                                      @scottalanmiller I need to export it and reboot? Confused 😕

                                      scottalanmillerS 1 Reply Last reply Reply Quote 0
                                      • scottalanmillerS
                                        scottalanmiller @Alex Sage
                                        last edited by

                                        @anonymous said:

                                        @scottalanmiller I need to export it and reboot? Confused 😕

                                        No, you have to add it to one of the files mentioned in order for it to apply after a reboot.

                                        A 1 Reply Last reply Reply Quote 1
                                        • A
                                          Alex Sage @scottalanmiller
                                          last edited by

                                          @scottalanmiller but I never rebooted.....

                                          scottalanmillerS 1 Reply Last reply Reply Quote 0
                                          • scottalanmillerS
                                            scottalanmiller @Alex Sage
                                            last edited by

                                            @anonymous said:

                                            @scottalanmiller but I never rebooted.....

                                            I didn't say that you did, I said that you spawned a new shell.

                                            1 Reply Last reply Reply Quote 0
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