It may be traffic related. I use my SSH access on ocasions, but not very
heavly. They may look for high amounts of incoming connections or traffic on
ports and block those. Personally thought I haven't been blocked for SSH
though.
BTW, what / who is "PHB"?
On 7/17/07, Matt Graham <
danceswithcrows@usa.net> wrote:
>
> On Tuesday 17 July 2007 09:30, after a long battle with technology,
> Shawn Badger wrote:
> > On 7/17/07, Michael Sammartano <volinaz@cox.net> wrote:
> > > Since when?? I have been running sshd on many boxes at home for
> > > many years. As far as SMTP service on port 25 and other providers,
> > > just set up the email client to use another port for SMTP, whats
> > > the big deal?
>
> This doesn't jive with the accounts of another PLUG poster about a month
> ago, who said he was running sshd on port 22 for a while, then had it
> blocked, then ran sshd on another port, then had it blocked, etcetera.
> His account also said that they do some form of (stateful packet
> inspection?) and start blocking ports if they see something like this:
>
> Random machine: 12345 > 22 SYN -> Cox machine
> Cox machine: 22 > 12345 SYN ACK -> Random machine
> Random machine: 12345 > 22 ACK -> Cox machine
> [normal TCP traffic over those ports]
>
> ...whether this is true for *every* Cox user or not, I don't know. They
> may have different policies in different geographical areas, or
> something. Or there's a traffic limit before they start blocking.
>
> For SMTP, the SMTP server also has to listen on a different port. SMTP
> servers that are run by clueless people or administratively paralyzed
> people may not be doing that.
>
> > I would also have to chime in and say that I have been using sshd for
> > some time with Cox. They only block what a vast majority of the
> > people consider the Internet from running as a service on the home
> > connections (SMTP and HTTP).
>
> Since the PHBs have apparently decided to use MSexchange for the new
> mailswerver, against my objections, I've got to have an SMTP server
> that I know will work and keep working accessible. Nothing
> high-traffic, just a backup for when the Exchange machine dies
> horribly.
>
> --
> "Dreams? Best leave dreams to those that can afford them."
> --Aunt Cordelia, _Wizard and Glass_, Stephen King
> There is no Darkness in Eternity/But only Light too dim for us to see
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