Finding DNS and SMTP server ID's
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Posted by Rich Piehl on December 22, 2006, 9:41 pm
Please log in for more thread options I'm having the installation of new equipment thrust on me and some of the stuff is on the fringe of my knowledge of computer networking. One of the things it needs in the network setup are the primary and secondary DNS server IP's and the SMTP server name or IP. When I go in to customers who are not computer literate and start asking for such things I'm usually met with blank stares. Often these are smaller companies who have no full or part-time IT departments. Usually their network was put together by the friend of a friend who isn't around to ask. I can generally find a static IP for my device by doing 'ipconfig' from a C prompt to get and idea of their network range, and then pinging around 'till I get no response (if they're using DHCP). But is there a similar command that I can use to find the information I need for the DNS and SMTP servers? Tanks, Rich | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Balwinder S \"bsd\" Dheeman on December 23, 2006, 12:02 am
Please log in for more thread options On 12/23/2006 08:11 AM, Rich Piehl wrote: The domain name system (DNS) stores and associates many types of information with domain names, but most importantly, it translates domain names (computer hostnames) to IP addresses. It also lists mail exchange servers accepting e-mail for each domain. In providing a worldwide keyword-based redirection service, DNS is an essential component of contemporary Internet use. Simple Mail Transfer Protocol (SMTP) is the de facto standard for e-mail transmissions across the Internet. Formally SMTP is defined in RFC 821 (STD 10) as amended by RFC 1123 (STD 3) chapter 5. The protocol used today is also known as ESMTP and defined in RFC 2821. Your ISP (Internet Services Provider) runs these for you, so you can use both the primary and secondary DNS server IP addresses and the SMTP server name or IO provided by your ISP; this does not restricts you to run your though, but that could be an added overhead for small sites. > When I go in to customers who are not computer literate and start asking
> for such things I'm usually met with blank stares. Often these are > smaller companies who have no full or part-time IT departments. Usually > their network was put together by the friend of a friend who isn't > around to ask. That's why their ISP's can make things easy and, or simple, even any local IT expert will ask these and, or other IP addresses from the ISP itself. > I can generally find a static IP for my device by doing 'ipconfig' from
> a C prompt to get and idea of their network range, and then pinging > around 'till I get no response (if they're using DHCP). But is there a > similar command that I can use to find the information I need for the > DNS and SMTP servers? Is possible, but ISP do run these kinds of services as yet, better make call to their helpline. Hope that helps, -- Dr Balwinder S "bsd" Dheeman Registered Linux User: #229709 Anu's Linux@HOME Machines: #168573, 170593, 259192 Chandigarh, UT, 160062, India Distros: Ubuntu, Fedora, Knoppix Home: http://cto.homelinux.net/~bsd/ Visit: http://counter.li.org/ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Robert Bonomi on December 25, 2006, 5:46 am
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>I'm having the installation of new equipment thrust on me and some of
>the stuff is on the fringe of my knowledge of computer networking. One >of the things it needs in the network setup are the primary and >secondary DNS server IP's and the SMTP server name or IP. > >When I go in to customers who are not computer literate and start asking >for such things I'm usually met with blank stares. Often these are >smaller companies who have no full or part-time IT departments. Usually >their network was put together by the friend of a friend who isn't >around to ask. > >I can generally find a static IP for my device by doing 'ipconfig' from >a C prompt to get and idea of their network range, and then pinging >around 'till I get no response (if they're using DHCP). But is there a >similar command that I can use to find the information I need for the >DNS and SMTP servers? The network range _is_ specified in the ipconfig output. If you don't know how to extract that from what ipconfig displays, you _shouldn't_ be doing this kind of work.A At least without more training. Demand that your employer send you to training, if he wants you to do this jobs That aside -- DNS/SMTP information is always made available -- usually on-line, sometimes it takes a phone call -- by the provider of the Internet connectivity that the customer is using. The other way to find out: "look at a machine where it is working", and copy those settings. Note: if they're using DHCP, and it is properly set up, the DHCP server _should_ be providing the IP address to the client machine for the DNS server. Outgoing SMTP servers are _frequently_ something very close to "mail..com" Incoming mail servers are frequently something close to "pop..com" Many providers have a web-page for their customers, with all these configuration settings on them. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by Rich Piehl on December 25, 2006, 9:25 am
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Robert Bonomi wrote: >
>>I'm having the installation of new equipment thrust on me and some of
>>the stuff is on the fringe of my knowledge of computer networking. One >>of the things it needs in the network setup are the primary and >>secondary DNS server IP's and the SMTP server name or IP. >> >>When I go in to customers who are not computer literate and start asking >>for such things I'm usually met with blank stares. Often these are >>smaller companies who have no full or part-time IT departments. Usually >>their network was put together by the friend of a friend who isn't >>around to ask. >> >>I can generally find a static IP for my device by doing 'ipconfig' from >>a C prompt to get and idea of their network range, and then pinging >>around 'till I get no response (if they're using DHCP). But is there a >>similar command that I can use to find the information I need for the >>DNS and SMTP servers? >
> > The network range _is_ specified in the ipconfig output. If you don't know > how to extract that from what ipconfig displays, you _shouldn't_ be doing > this kind of work.A At least without more training. Demand that your > employer send you to training, if he wants you to do this jobs > There's no need to talk down to me. I know what IPCONFIG does...and doesn't give. > That aside --
> > DNS/SMTP information is always made available -- usually on-line, sometimes > it takes a phone call -- by the provider of the Internet connectivity > that the customer is using. > > The other way to find out: "look at a machine where it is working", and > copy those settings. > > Note: if they're using DHCP, and it is properly set up, the DHCP server > _should_ be providing the IP address to the client machine for the DNS > server. > > Outgoing SMTP servers are _frequently_ something very close to > "mail..com" > Incoming mail servers are frequently something close to > "pop..com" >
> Many providers have a web-page for their customers, with all these > configuration settings on them. > Correct me if I'm wrong, but unless I have the DNS server ID's putting mail.[name].com won't do beans since my device has know what of finding what IP address mail.[name].com goes to. And my device doesn't do DHCP so it can't pull it from the DHCP server. So then I'm back to square one - sort of trying to track down someone at the ISP who might be able to help is there another way to determine the address of the DNS server for the network? Take care, Rich God bless the USA -- Happy RamaHanaKwanzmas! | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Posted by John L on December 25, 2006, 12:44 pm
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> And my device doesn't do DHCP so it can't pull it from the DHCP
> server. So then I'm back to square one - sort of trying to track > down someone at the ISP who might be able to help is there another > way to determine the address of the DNS server for the network? Bring along your laptop, plug it into the network, and see what DNS server the DHCP server provides. Then use that. If there is no DHCP server, look at the config of some other machine on the same network segment. Sheesh. There is no standard for mail servers. If guessing obvious names doesn't work, most ISPs have web sites for their users with configuration info. R's, John | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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> the stuff is on the fringe of my knowledge of computer networking. One
> of the things it needs in the network setup are the primary and
> secondary DNS server IP's and the SMTP server name or IP.