[DeleGate-En] Re: Tunneling applications using HTTP
On 05/13/99(03:49) you firstname.lastname@example.org wrote
|I am trying to use delegate to setup a tunnel across a firewall that only
|What I want to do is the following:
|client <---generic tcp --->delegate <---http--->delegate<---generic
|where the client <-->server protocol is proprietary (actually structures
|sockets) and the http part (between the two delegated processes) passing
|through one or
|more firewalls. This is the classic http tunnel problem.
|I tried various combinations but they don't work. If there is no
|requirement of http in the
|middle then the tcprelay option works.
Do you mean that your firewall checks not only whether the port
number in packets is 80 but also whether the content of a packet
is in the message formats of HTTP protocol?
Even so I think you can configure cascaded DeleGates to tunnel
across such firewall. But I'm not sure whether or not such kind
of usage of DeleGate does not violate a security policy of a network...
Yutaka Sato <email@example.com> http://www.etl.go.jp/~ysato/ @ @
Computer Science Division, Electrotechnical Laboratory ( - )
1-1-4 Umezono, Tsukuba, Ibaraki, 305-8568 Japan _< >_