9 Jul
2000
9 Jul
'00
4:12 p.m.
"Derrick" <Derrick@anei.com>
Blocking SSH is a weak solution.
I wrote:
No. We are just rapidly approaching the point where people realize it has always been the case that this is impossible.
I meant it has always been the case that blocking covert channels of communication was technically impossible. You can tunnel ssh or equivalent through email wordcounts if you really feel the need. I'm not an expert, but there is good information theory that says once you allow more than trivial bit rates in/out of an organization, blocking covert communication encapsulated one way or another becomes extremely hard. -- Alex Bligh VP Core Network, Concentric Network Corporation (formerly GX Networks, Xara Networks)