Re: OpenSSH 3.4p1 Trouble on SCO 5.0.5?

In article <47E6160C.7080405@xxxxxxx>,
Steve M. Fabac, Jr. <smfabac@xxxxxxx> wrote:
I have a client running SCO 5.0.5 with OpenSSH 3.4p1
installed.

Since SSH was installed, we have been getting hits from
people on the Internet scanning port 22.

Normally they give up and go away. However, I have noticed
an unusual number of scans from foreign IP addresses using
valid names on the system (the names below in the block for
a single source IP are the *only* names logged from that
IP):

.....

Anybody have any ideas, thoughts or comments on this?

I've seen as high as 10,000 such attemts per day - but these are
on mail and web servers directly connected to a tier 1 backbone
[level 3] in their Orlando colo. They actually switch [not route]
connections across the US so I can see 1 hop from Orlando to
Seattle - that's one reason they carry about 60% of the 'net
traffic.

But as Nico said in his reply to you, you really shouldn't put SCO
on a directly connected internet.

IMO the ONLY machines that should be do so would be machines
that MUST be connected - eg mail servers and web servers. All
other machines should be behind a firewall.

Ideally 3 NIC cards connected to SWITCHES not hubs, would
have a public access IP, and those sould connect to the second set
[A DMZ area] with such things as your web servers, and the 3rd
NIC would go to your business machines on a totally private network
so nothing from the outside world would ever get through.

It's easy and cheap to set up a separate mail/web server
and keep you important machines hidden. I run on FreeBSD since
swithcing an ISP from SGIs back in 1995 and it can run on a slim
machine and is awfully solid.

If you think you are seeing a lot of attacks, just wait - they get
more numerous as time goes by.

Bill

--
Bill Vermillion - bv @ wjv . com
.

Relevant Pages

  • Re: OpenSSH 3.4p1 Trouble on SCO 5.0.5?
    ... people on the Internet scanning port 22. ... connections across the US so I can see 1 hop from Orlando to ... IMO the ONLY machines that should be do so would be machines ... that MUST be connected - eg mail servers and web servers. ...
    (comp.unix.sco.misc)
  • Re: OpenSSH 3.4p1 Trouble on SCO 5.0.5?
    ... connections across the US so I can see 1 hop from Orlando to ... IMO the ONLY machines that should be do so would be machines ... that MUST be connected - eg mail servers and web servers. ... Switching the SSH port to, say, 1022 and making sure there are ...
    (comp.unix.sco.misc)
  • Re: OpenSSH 3.4p1 Trouble on SCO 5.0.5?
    ... connections across the US so I can see 1 hop from Orlando to ... I neglected to indicate that the machine is behind a firewall and port ... that MUST be connected - eg mail servers and web servers. ... NIC would go to your business machines on a totally private network ...
    (comp.unix.sco.misc)
  • Re: New virus?
    ... P2P networks, listen on TCP port 81, and attempt downloading files ... witnessed outbound connections on TCP port 81, ... web servers via HTTP in order to register itself with the server's ... attack targeting two unrelated financial services organizations. ...
    (sci.med.transcription)
  • RE: I think Ive been hacked...please help!
    ... ./I have several machines that are using excessive bandwidth. ... I find multiple connections to servers with names like ... ./Incoming connections are random although 1067 seems to be a common one. ... Maybe they don't see eggdrops as a threat / trojan. ...
    (Incidents)