using curl to log in to router
This is a discussion on using curl to log in to router within the Linux Administration forums, part of the Linux Forums category; I'm trying to use curl to log in to a router so I can retrieve the current WAN IP ...
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02-01-2006
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using curl to log in to router
I'm trying to use curl to log in to a router so I can retrieve the
current WAN IP address periodically - it changes at least twice a week and getting it manually is annoying (obviously I need to do this from the LAN side). I can get the appropriate line through curl and grep once I'm logged in, but I'm not sure how to do the submit. The examples I've seen use the name of the submit button to post the form data, but the button on my router doesn't have a name. The relevant HTML code is <BODY bgcolor="#0000FF"> <form action="login.htm" method="post" name="tF"> <input type="hidden" name="page" value="login"> <table border="0" width="100%" height="184" cellspacing="0"> <tr> <td width="50%" height="19" align="right"> <font face="Arial, Helvetica, sans-serif" size="2" color="#FFFFFF">Password :</font></td> <td width="50%" height="19" align="left"> <INPUT type="password" maxLength=12 size=9 name=pws></td><p> </tr> <tr> <td width="50%" height="19" align="right"> <INPUT type="submit" value="Login"><img src="image/PIXEL.GIF" width="6" height="1"> </td> <td width="50%" height="19" align="left"> <INPUT class=button onclick=window.close(); type=button value=Cancel> </td> </tr> </table> </body> </FORM> </BODY> I'm not sure if the mistake in the HTML coding (incorrect closure of the </body> and </form> tags is important, but the login form does work if I log in through a browser. I just need to do it through curl! So if anyone can tell me how to use curl to do a submit without a named submit button, I'd appreciate it. :) 
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02-05-2006
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Re: using curl to log in to router
Gary Dale wrote:
> I'm trying to use curl to log in to a router so I can retrieve the > current WAN IP address periodically - it changes at least twice a week > and getting it manually is annoying (obviously I need to do this from > the LAN side). I can get the appropriate line through curl and grep once Maybe I'm just lazy, but rather than curl i just use the following line: wget http://checkip.dyndns.org -qO - | cut -d : -f 2 | cut -d '<' -f 1 should work just fine for you.. as long as you have wget & cut.. ;) -- alex USER, n.: The word computer professionals use when they mean "idiot".
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02-05-2006
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Re: using curl to log in to router
alex wrote:
> Gary Dale wrote: > >> I'm trying to use curl to log in to a router so I can retrieve the >> current WAN IP address periodically - it changes at least twice a week >> and getting it manually is annoying (obviously I need to do this from >> the LAN side). I can get the appropriate line through curl and grep once > > > Maybe I'm just lazy, but rather than curl i just use the following line: > > > wget http://checkip.dyndns.org -qO - | cut -d : -f 2 | cut -d '<' -f 1 > > > should work just fine for you.. as long as you have wget & cut.. ;) > > Yes. In fact curl and grep can do the same thing (probably a bit simpler too) - as long as the service exists and is free. On the other hand, querying the router will always be there and be free. I just need to ensure that the script containing the password is properly secured. I've got this working on another router from a different manufacturer, but not this particular one. The other router uses a normal user-id:password syntax to log in. Then it's just a matter of identifying the correct page to extract the ip address from.
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