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Re: [webmin-l] accessing webmin suddenly stopped
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From: Jamie C. <jca...@we...> - 2006-09-19 06:56:43
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On 18/Sep/2006 23:43 Russell Quinn wrote .. <blockquote type=3D"cite"> <div class=3D"Section1"> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> Hello,<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> Webmin (SSL mode) has been running fine for a while, but I've just <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> tried to access it after a few days and just receive a *timeout <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> message* from my browser. It's running on CentOS4.4 on a remote <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> server, that I just have shell access too, via telnet.<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> I've tried:<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> . Rebooting the server - Webmin appears to restart perfectly . Process <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> list - miniserv is running . Miniserv.error - No error messages . Wget <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> - I used wget from the shell terminal to connect to the webmin port on <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> the localhost and it worked, successfully returning index.html<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> * iptables - Nothing has changed since Webmin was last working, and <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> I've tried shutting it down just to make sure.<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> Note that I also have Usermin running and that is fine.<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> I really can't figure this one out.<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> Any ideas? Anything else I can check and try.<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";"><o:p> </o:p></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> > If wget works locally, I would suspect a firewall is blocking port <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> > 10000 between your server and the client PC. Try running the command :<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> ><o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> > tcpdump port 10000<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> ><o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> > as root on the Webmin server, and then connecting using your browser. <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> > If no packets get displayed by the tcpdump command, then something <o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">> > must be blocking them.<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";"><o:p> </o:p></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">I ran tcpdump and it reported nothing. There are no entries in iptables and the port was open before. Where else should I check to see if it's blocked?<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";"><o:p> </o:p></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">Would the connection time out if the port was closed?<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";"><o:p> </o:p></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Courier New"><span style=3D"font-size: 10pt; font-family: "Courier New";">Russell.<o:p /></span></font></p> <p class=3D"MsoNormal"><font size=3D"2" face=3D"Arial"><span style=3D"font-size: 10pt; font-family: Arial;"><o:p> </o:p></span></font></p> </div> </blockquote>Is there perhaps some other firewall in between your PC running the browser,<br />and the Linux box running Webmin? The fact that tcpdump doesn't report anything<br />suggests that no packets are getting through, which typically indicates a firewall somewhere.<br /><br />=A0- Jamie<br /><br /> |
