Unable to allocate port with port forwarding software

djeepp · 01-27-2008, 10:56 AM

I am using a port forwarding java powered software called Enexity Securelink. When I connect to a site, the software seems unable to forward many ports under 10000. The error message in the log looks like this.

Quote:

#################### ERROR ####################
Jan 25, 2008 12:58:41 PM ERROR: Failed to Forward Local Port 22 to 12136
com.jcraft.jsch.JSchException: PortForwardingL: local port 127.0.0.6:22 cannot be bound.
at com.jcraft.jsch.PortWatcher.<init>(Unknown Source)
at com.jcraft.jsch.PortWatcher.addPort(Unknown Source)
at com.jcraft.jsch.Session.setPortForwardingL(Unknown Source)
at com.jcraft.jsch.Session.setPortForwardingL(Unknown Source)
at rss.scbase.RssScBase.processForwardL(RssScBase.java:576)
at rss.scbase.RssScBase.processRequests(RssScBase.java:418)
at rss.sdc.RssSdc.run(RssSdc.java:128)
at rss.sdc.SdcApplet.runSdc(SdcApplet.java:242)
at rss.sdc.SdcApplet.access$100(SdcApplet.java:19)
at rss.sdc.SdcApplet$1.run(SdcApplet.java:79)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.net.BindException: Permission denied
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
at java.net.ServerSocket.bind(ServerSocket.java:319)
at java.net.ServerSocket.<init>(ServerSocket.java:185)

I need to be able to forward to these ports. Is this a permissions issue?

I am running Gutsy Gibbon on an HP Pavilion zd8000.

harry edwards · 01-27-2008, 04:51 PM

ssh uses port 22. If sshd is running, it may explain why you get the message "cannot bind", as it will already have the connection open.

djeepp · 01-28-2008, 03:44 PM

What about port 80? I don't have any web services running and an lsof -i doesn't show 80 occupied by anything, yet it forwards port 80 to 10180 or 10380 on 127.0.0.1 through 127.0.0.20. It makes me think that my user doesn't have permissions to lock these ports. Can this be the case? If so, how do I check for that?

djeepp · 01-29-2008, 07:28 AM

I think I figured this one out myself. I gave the java_vm a Set UID permission so it runs as root. It was able to bind to those ports.