Catagorized Notes

Renamed notes to fit categories and be easier to find later: blog, config, howto
2023-04-28 10:31:11 -04:00
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-# SSH Notes
-
-## SSH Tunneling
-
-### Local Forwarding
-
-#### Examples
-
-NOTE: these use autossh to prevent the tunnel from dying
-
-Plex
-
-```shell
-autossh -f -nNT -p3141 -N -L 8080:192.168.0.209:32400 chawley@aristotle.planethawleywood.com
-```
-
-ESXi
-
-```shell
-autossh -f -nNT -p3141 -N -L 8090:192.168.0.208:443 chawley@aristotle.planethawleywood.com
-```
-
-Both ESXi and AWX
-
-```shell
-autossh -f -nNT -p3141 -N -L 8090:192.168.0.208:443 -L 8091:192.168.0.25:80 chawley@aristotle.planethawleywood.com
-```
-
-Both Plex and Derry OD
-
-```shell
-autossh -f -nNT -p3141 -N -L 8080:192.168.0.209:32400 -L 8070:192.168.0.209:80 chawley@aristotle.planethawleywood.com
-```
-
---
-
-
-<table>
-  <tr>
-   <td><strong>Protocol</strong>
-   </td>
-   <td>SSH
-   </td>
-  </tr>
-  <tr>
-   <td><strong>From</strong>
-   </td>
-   <td>my office workstation
-   </td>
-  </tr>
-  <tr>
-   <td><strong>To</strong>
-   </td>
-   <td>RRD Jumpbox (54.84.9.50)
-   </td>
-  </tr>
-  <tr>
-   <td><strong>Via</strong>
-   </td>
-   <td>chawley2@ladmin2
-   </td>
-  </tr>
-  <tr>
-   <td><strong>Notes</strong>
-   </td>
-   <td> I have the jumpbox host configured in.ssh/config on both machines
-   </td>
-  </tr>
-  <tr>
-   <td colspan="2" ><strong><code>ssh -N -L 8090:54.184.92.50:22 chawley2@ladmin2.precisiondm.com</code></strong>
-   </td>
-  </tr>
-</table>
-
-
-
-<table>
-  <tr>
-   <td><strong>Protocol</strong>
-   </td>
-   <td>web
-   </td>
-  </tr>
-  <tr>
-   <td><strong>From</strong>
-   </td>
-   <td>my office workstation
-   </td>
-  </tr>
-  <tr>
-   <td><strong>To</strong>
-   </td>
-   <td>Plex (derry)
-   </td>
-  </tr>
-  <tr>
-   <td><strong>Via</strong>
-   </td>
-   <td>chawley@aristotle
-   </td>
-  </tr>
-  <tr>
-   <td colspan="2" ><strong><code>ssh -p3141 -N -L 8080:192.168.0.209:32400 chawley@aristotle.planethawleywood.com</code></strong>
-   </td>
-  </tr>
-</table>
-
-
-### Remote Forwarding
-
-NOTE: By default, OpenSSH only allows connecting to remote forwarded ports from the server host. However, the GatewayPorts option in the server configuration file sshd_config can be used to control this. 
-
-The following alternatives are possible:
-
-```shell
-GatewayPorts no
-```
-
-This prevents connecting to forwarded ports from outside the server computer.
-
-```shell
-GatewayPorts yes
-```
-
-This allows anyone to connect to the forwarded ports. If the server is on the public Internet, anyone on the Internet can connect to the port.
-
-#### Examples
-
-<table>
-  <tr>
-   <td><strong>Protocol</strong>
-   </td>
-   <td>web
-   </td>
-  </tr>
-  <tr>
-   <td><strong>From</strong>
-   </td>
-   <td>derry
-   </td>
-  </tr>
-  <tr>
-   <td><strong>To</strong>
-   </td>
-   <td>overlook
-   </td>
-  </tr>
-  <tr>
-   <td><strong>Notes</strong>
-   </td>
-   <td>This allows you to access apache web pages on derry by visiting <code>http://overlook.planethawleywood.com:8888</code> as long as <code>GatewayPorts yes</code> is present in <code>/etc/ssh/sshd_config</code> (as explained above) and port 8888 is open on Overlook
-   </td>
-  </tr>
-  <tr>
-   <td colspan="2" ><strong><code>ssh -R 8888:localhost:80 root@overlook</code></strong>
-   </td>
-  </tr>
-</table>
-
-### Reference
-
-* [How To Use SSH Tunneling](https://www.howtogeek.com/168145/how-to-use-ssh-tunneling/)
-* [SSH Port Forwarding Example](https://www.ssh.com/ssh/tunneling/example)
-
-
-## Kill Unresponsive SSH
-
-### Summary
-
-Let’s say you’re happily typing in your remote shell when all of a sudden, the crappy Wi-Fi network you’re using goes down. You end up with a perfectly unusable frozen shell, ugh!
-
-To do that, assuming you lost connectivity, press in that order:
-
-
-```shell
-[Enter]
-~
-.
-```
-
-
-That is, &lt;return key> then tilde then period
-
-This will send an escape sequence to your local SSH client and terminate the connection.—So this will always work even without a network connection.
-
-Here’s the list of escape sequences:
-
-
-### Supported escape sequences:
-
-`~.` - terminate connection (and any multiplexed sessions) \
-`~B` - send a BREAK to the remote system \
-`~C` - open a command line \
-`~R` - Request rekey (SSH protocol 2 only) \
-`~^Z `- suspend ssh \
-<code>~<em>#</em></code> - list forwarded connections \
-<code>~&</code> - background ssh (when waiting for connections to terminate) \
-<code>~?</code> - this message \
-<code>~~</code> - send the escape character by typing it twice \
- \
-(Note that escapes are only recognized immediately after newline.)
-
-
-## SSH Keygen
-
-### Generate an SSH Key with a comment
-
-```shell
-ssh-keygen -C "comment" -f <file>
-```
-
@@ -0,0 +1,82 @@
+# SSH Tunneling
+
+## Local Forwarding
+
+### Examples
+
+NOTE: these use autossh to prevent the tunnel from dying
+
+Plex
+
+```shell
+autossh -f -nNT -p3141 -N -L 8080:192.168.0.209:32400 chawley@aristotle.planethawleywood.com
+```
+
+ESXi
+
+```shell
+autossh -f -nNT -p3141 -N -L 8090:192.168.0.208:443 chawley@aristotle.planethawleywood.com
+```
+
+Both ESXi and AWX
+
+```shell
+autossh -f -nNT -p3141 -N -L 8090:192.168.0.208:443 -L 8091:192.168.0.25:80 chawley@aristotle.planethawleywood.com
+```
+
+Both Plex and Derry OD
+
+```shell
+autossh -f -nNT -p3141 -N -L 8080:192.168.0.209:32400 -L 8070:192.168.0.209:80 chawley@aristotle.planethawleywood.com
+```
+
+---
+
+| Protocol | From                  | To          | via              | Notes                                                             |
+| -------- | --------------------- | ----------- | ---------------- | ----------------------------------------------------------------- |
+| SSH      | my office workstation | RRD Jumpbox | chawley2@ladmin2 | I have the jumpbox host configured in.ssh/config on both machines |
+
+```shell
+ssh -N -L 8090:54.184.92.50:22 chawley2@ladmin2
+```
+
+| Protocol | From                  | To          | via              | Notes                                                             |
+| -------- | --------------------- | ----------- | ---------------- | ----------------------------------------------------------------- |
+| SSH      | my office workstation | Plex (derry) | chawley@aristotle |  |
+
+```shell
+ssh -p3141 -N -L 8080:192.168.0.209:32400 chawley@aristotle.planethawleywood.com
+```
+
+## Remote Forwarding
+
+NOTE: By default, OpenSSH only allows connecting to remote forwarded ports from the server host. However, the GatewayPorts option in the server configuration file sshd_config can be used to control this. 
+
+The following alternatives are possible:
+
+```shell
+GatewayPorts no
+```
+
+This prevents connecting to forwarded ports from outside the server computer.
+
+```shell
+GatewayPorts yes
+```
+
+This allows anyone to connect to the forwarded ports. If the server is on the public Internet, anyone on the Internet can connect to the port.
+
+### Example
+
+| Protocol | From                  | To          | Notes |
+| -------- | --------------------- | ----------- | -------------- |
+| web      | derry | overlook | This allows you to access apache web pages on derry by visiting <code>http://overlook.planethawleywood.com:8888</code> as long as <code>GatewayPorts yes</code> is present in <code>/etc/ssh/sshd_config</code> (as explained above) and port 8888 is open on Overlook |
+
+```shell
+ssh -R 8888:localhost:80 root@overlook
+```
+
+## Reference
+
+* [How To Use SSH Tunneling](https://www.howtogeek.com/168145/how-to-use-ssh-tunneling/)
+* [SSH Port Forwarding Example](https://www.ssh.com/ssh/tunneling/example)
@@ -0,0 +1,7 @@
+# SSH Keygen
+
+## Generate an SSH Key with a comment
+
+```shell
+ssh-keygen -C "comment" -f <file>
+```