ssh -t shmem@gateway ssh -t admin@host.example.com \
ssh -t wrxd15@192.168.123.2 ssh -t root@192.168.254.2
... I don't have the password for wrxd15@192.168.123.2, nor is this user allowed to login to 192.168.254.2 as root. The root passwords are generally unknown. It's my public key that is installed on each of these accounts in ~/.ssh/authorized_keys2, and my private key certainly won't leave my machine.
Furthermore, with a complex network setup, and being forced to use multiple ways to connect to a remote site - that occurs generally after a service down alert has arrived - entries in ~/.ssh/config aren't that useful for me.
I whipped the above cruft up because I need tunneling and forwarding of arbitrary local/remote ports to/from the remote host with changing requirements.
<update>
I need
host1 host2 host3
+-------+ +-------+ +-------+
ssh 1 ----------\ | | | | |
ssh 2 ---------------------\ | | |
ssh 3 ================================> |
ssh 2 ---------------------/ | | |
ssh 1 ----------/ | | | | |
+-------+ +-------+ +-------+
rather than
host1 host2 host3
+-------+ +-------+ +-------+
| | | | | |
| | | | | |
ssh 1 ======> ssh 2 ===> ssh 3 =======> |
| | | | | |
| | | | | |
+-------+ +-------+ +-------+
The most insane thing I do sometimes is tunneling
a complete network via ppp through 5+ chained ssh's:
host1 host2 host3 | |
+-------+ +-------+ +-------+ | |
ssh 1 ---------\ | | | | proxy | |n|
ssh 2 --------------------\ | | arp | |e|
ssh 3 --------------------------------\ \| |t|
ppp ===== compress ======================^===== |
ssh 3 --------------------------------/ | |w|
ssh 2 --------------------/ | | | |o|
ssh 1 ---------/ | | | | | |r|
+-------+ +-------+ +-------+ |k|
</update>
--shmem
_($_=" "x(1<<5)."?\n".q·/)Oo. G°\ /
/\_¯/(q /
---------------------------- \__(m.====·.(_("always off the crowd"))."·
");sub _{s./.($e="'Itrs `mnsgdq Gdbj O`qkdq")=~y/"-y/#-z/;$e.e && print}
|