unixtippse's questions

On this intranet system, I have about 100 incoming SFTP jobs that start running at the same time, and which regularly hit the MaxStartups default of 10.

Of course, according to the owner of the SFTP jobs, chronological distribution of the jobs is totally impossible and entirely out of the question. I therefore wonder what experience you might have with raising MaxStartups significantly to a value of 50, 100 or 200.

Will the server be able to handle that many simultaneous authentications? I have no experience with that amount of concurrency on SSH.

The server is of course current hardware. 8 CPU cores @2.13GHz and 4 GB RAM.

Given the following directory:

drwx------ 2 joe joe 4096 Jan 11  2010 /home/joe

Is there a way for me as the user root, to avoid accidentally cd-ing into this directory?

I'm not looking for actual permission enforcement, but for some setting (e.g. in the bash shell) that helps the root user avoid such a "private" directory.

I have a customer who polls e-mail for a number of accounts in domain example.com via POP. Now they have a VIP user [email protected] who wants to use Microsoft Hosted Exchange on his mobile phone.

Unfortunately the descriptions of Hosted Exchange aren't too detailed and in heavy Microsoft lingo. My question is: Can it be configured so that it handles mail for this single user, while all other mail accounts remain on the POP server?

One approach for inbound mail would be to buy Hosted Exchange for a dedicated domain, such as exchange.example.com and reroute [email protected] to [email protected].

Which leaves outbound mail: Can Hosted Exchange be configured to relay mail through my mail relay where I can rewrite the sender [email protected] to [email protected]? Or can it forge the sender address on outbound mail altogether, without relaying through my server? (SPF records are not an issue.)

Can any of you tell me whether it is possible to replace the HP 250GB SATA drive named GB0250EAFJF (the drive has HP branded firmware) with a standard 250 GB SATA drive from the computer parts dealer? I assume that the bracket will fit, but will the server accept the drive if the HP firmware is missing?

Warranty is not an issue.

I reach my home site through a DynDNS name, and also have tunneled IPv6 there.

In the DNS zone, I have:

myhomesite CNAME example.dyndns.org.

How do I simultaneously point "myhomesite" to an AAAA record? If I trivially make it

myhomesite CNAME example.dyndns.org.
myhomesite AAAA  2001:db8::1:2:3:4

the zone is invalid (CNAME and other data).

Can you suggest a way for having the CNAME record and the AAAA record visible behind the same domain name?

What I'm not looking for is an ".ipv6."-infixed record, which already is in place.