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visits member for 4 years, 9 months
seen Apr 11 '12 at 13:15

Aug
3
comment Unable to access virtual IP after configuring NLB in windows 2008
thanks for the +...I've been told similar by both networking and MS techs. I've never actually bothered to dig into the guts of NLB to understand the actual workings of it, but it's my understanding that it essentially replicates (i.e., converts to broadcast) traffic between the nodes?
Jul
5
comment Point A record to domain
DNS is not (by default) capable of this. Alternately, you could CNAME to mypage.www.example.com, but not the HTTP path.
Jun
30
comment DNS requests failing from computers that can ping DNS server
don't forget that the response needs to be allowed as well...if you can turn up debugging or use a packet capture to verify that the server is receiving the request, you'll at least have identified which part of the request/response is failing
Jun
28
comment Postfix - am I sending spam?
I also routinely check the output of pfloggsum for higher then normal defer counts to catch when one of my boxes has been blacklisted.
Apr
14
comment Postfix to relay mails to other SMTP for particular domain
+1 for this answer. Additionally, you can specify via IP address by using smtp:[ip.add.re.ss]. The [] suppresses MX lookups and forces the system to try to send to whatever destination you've specified. postfix.org/transport.5.html
Apr
11
comment Redirect loop in GoDaddy web hosting
This is unlikely to be a DNS issue, as DNS does not contain a mechanism to do redirects. My suggestion would be to fire up Fiddler (on Windows) or paros (on linux) and hit that page to help find out where the redirects are actually coming from.
Apr
11
comment Why would I be getting IXFR and AXFR transfer denied on my DNS server?
Also verify that you're allowing TCP:53 to the server you're trying to transfer from.
Apr
11
comment Cisco Catalyst 3550 Switch - VLAN ACL question
@HampusLi - I should have known that, as I've got a 3550 floating around somewhere in my datacenter, even though it's only doing L2.
Aug
26
comment How do you search for backdoors from the previous IT person?
another +1 for adding the, what some would consider obvious, idea that making sure your outgoing admin isn't psychotically pissed off at you may be allow you to save the business potentially millions of dollars in consultants.
Aug
20
comment Postfix mail forwarder
normal help type info for debugging postfix includes the output from a postconf -n and any pertinent log info
Aug
20
comment DNS roundrobin primary IP problem
here's a writeup I did for a similar question: serverfault.com/questions/55780/…
Aug
13
comment Postfix open relay
are you wanting a remote user to be able to "bounce" mail thru your server or do you want your server to accept and locally deliver mail with any @destination? You might take a look at this: serverfault.com/questions/164105/… to see if it's what you're wanting.
Aug
13
comment How do I set up failover for a single web server using two ISPs?
actually, the OP's original problem is more one of asynchronous routing than the DNS response. While I've never actually asked, I'd have to imagine that most cable/DSL providers will balk at sending out BGP advertisements for a home connection.
Aug
10
comment I need a server or service that reroutes DNS requests
I do run multiple DNS servers, actually multiple clustered DNS servers behind a hardware load balancer, and a hidden master. But, this would work just as well, if with less reliable uptime, with a single server. I would be more than happy to either post the files here or bundle them up and email if it would be useful.
Aug
10
comment How do I setup Bind9 on ubuntu as a nameserver?
glad to be of help...just to clarify for the populace at large, if this were an internal only DNS server, all you would have to do is make sure your internal clients were pointed at the server. But, for a publicly facing server, your registrar has to point to your server(s)
Aug
8
comment No-ip works for non-internal clients, pinging works internally
this is a known issue with most of the Cisco firewalls I've dealt with (PIX & ASA).
Aug
2
comment does a 302 redirect force another DNS lookup?
so, while a 302 does not specifically cause another DNS lookup, if the normal TTL has expired, it will force another one. This would be contrary to the behavior we've actually seen in browsers. Supporting documentation: The browser - in order to speed up performance - maintains a cache of results which in the abscence of any other information is timed out after 30 minutes in the case of MS Explorer and 1 minute in the case of the Mozilla family (configurable in both cases) - from netwidget.net/books/apress/dns/info/minimum-ttl.html
Aug
2
comment does a 302 redirect force another DNS lookup?
+1 - specifically, the local DNS are clustered BIND servers (behind the same hardware load balancers), with NS delegations to the GSLB devices for the load-balanced records. Additional info added to OP
Jun
2
comment Is there anything I can do about someone who has pointed their domain at my ip?
and, if they fail to correct the situation, you can always setup a redirect to your favorite porn site =)
Feb
9
comment Getting a feel for postfix
anytime...again, if you run into specific issues, please feel free to post up. I've gotten postfix to do some pretty weird things in my time =)