I can seem to open port 25565 for a java application (executable jar) I'm running ubuntu server 9 thoroughly up to date code...
Yet connections to port 25565 fail when I have the firewall enabled (sudo ufw enable) For example canyouseeme.org says "Error: I could not see your service on port (25565) Reason: Connection timed out"
And connections to port 25565 _DO WORK_ when I disable the firewall (sudo ufw disable) canyouseeme.org says "Success: I can see your service on port (25565)"
I have two computers on a LAN. (This is history not a Bazaar question, although I have one of those too) One of them (Ubuntu 9.04) Im using as a Bazaar repository over sftp. Its been working fine for about a year. Then we had a thunderstorm that knocked out our Internet service for a couple of days. When it came back up everything is working fine accept I could no longer commit to the server. A little detective work showed that ssh was not running on the server. I started it and Bazaar then couldnt find the repository files. I still suspected an ssh problem, but port scans from both computers showed port 22 open on the server and I could do a ssh login from the client ok. Then I started fiddling with ssh on the server and now I have ssh problems on top of the Bazaar problems.
On the server I deleted then regenerated the ssh keys. Ive done sudo /etc/init.d/ssh reload sudo /etc/init.d/ssh start
I get a normal starting message and ps ef |grep ssh
shows /usr/sbin/sshd running. But the port scan does not show 22 open and I get connection refused at the client.
I am configuring an internal only IMAP server for archival emails. I am absolutely baffled why my connection is being refused. UFW is disabled and IPTABLES has a rule to allow all connections on 143 and 993. When I telnet this response is given:
Code: telnet localhost 143 Trying 127.0.0.1... telnet: Unable to connect to remote host: Connection refused Even nmap shows the port closed. Here is my iptables rule: HTML Code: -A ufw-user-input -p udp -m udp --dport 143 -j ACCEPT
Is there any way to verify if packets being trafficked over a certain port are valid for the service you want to use this port for?
One obvious example that probably clarifies my question: When I open port 443 (outgoing or incoming) for https/ssl traffic, I don't want this port to be used for say openvpn traffic. Thus: when someone wants to surf to a website with https, it should be ok but if someone wants to connect to his home openvpn server over that same port, it should be blocked.
Strange issue here when trying to verify firewall on Server 8.04. No ftp service running at all on server, but both nmap and netcat report port 21 as being open, even though it isn't.I am 100% sure that port 21 is not actually accessible and iptables rules are fine. Trying to connect to the port fails, yet nmap and netcat seem to report a "false positive"?Have also checked on a number of other servers I'm running, and this "false positive" seems to apply to all of them.
When logged in as my standard user in Fedora 11 gnome desktop the installed ntfs-config tool will not open and gives an error which says this; "no authentication program found", and to run that ntfs-config as the root in a terminal. So then the only way to open that tool is to type that in a terminal, and it did open, but how can I fix this ? Can this issue be related to ownership and permissions of it ? Also the num lock does not come on during boot up, is there a easy fix for that too ? This is a recent fresh updated install from the DVD with the ext4 file system. All the ntfs-3g applications are installed as default, so I just added that enable ntfs write support tool with the package manager.
I'm running Fedora 11 64bit on an Acer Aspire 3935, dual boot with Windows Vista. I installed three days ago and the system is supposedly fully updated. While doing some routine configuring I noticed that I am unable to access the Preference window of File Management.
I want to check the box for 'always open in browser windows', but therefore I need the Preference window. When I try to access through System > Preferences > File Management, it says starting for a few seconds and then nothing. When I try to access through Computer > Edit > Preferences, the window crashes and disappears. I suppose there are other ways to change that setting, but in any case I'd like to get the general problem solved, not only the setting changed.
I found that I can not use the UDP port on FC 12.I new install one FC 12 , but when I use the next command nmap -sU localhost.I found all udp port has been filtered.I don't know how to open the udp ports . for I need use some udp port.I use iptables , but not working. Why ?
I just done a brand new install of fed12 and did all the yum updates. Apache seems to start ok and I always liked the http config tool but it won't run on Fedora 12. I downloaded and installed system-config-httpd.noarch 5:1.4.6-1.fc12 and it all went fine but when I try to start it I get the usual box asking for my root password, I type it in and press enter, the box disappears and then....nothing. If I run system-config-httpd in a terminal I get the same box asking for root passowrd but when I enter it I get a long scroll of text which ends with:
line 4: 2137 Aborted (core dumped) /usr/bin/python /usr/share/system-config-httpd/ApacheConf.py
I don't know what causes this. Is there any way to get the http config tool working?
I want to open the port 18680 on my remote Fedora 14 machine. I didsudo iptables -I INPUT -p tcp --dport 18680 -m state --state NEW,ESTABLISHED -j ACCEPTsudo iptables -I OUTPUT -p tcp --sport 18680 -m state --state ESTABLISHED -j ACCEPTsudo service iptables saveThe status returned is OK.I have also opened the port on my security group on Amazon. Also, I rebooted the machine.When I use the browser to view the application running at port 18680 the browser cannot connect.
i need to install vpnc in amazon ec2 fedor 8 instance. i have installed with yum install vpnc commaned. And i have placed config file in /etc/vpnc/some.conf. but it is not connecting and giving the following error. vpnc: can't open /dev/net/tun, check that it is either device char 10 200 or (with DevFS) a symlink to ../misc/net/tun (not misc/net/tun): No such device.
there is a tool, which can check and compare DNS records for me. I'd like to tell it to look at our private subnet, and it for to return records which have missing or different DNS records, than were expected. if it just looked up every record and returned it in a "neat" way, that'd work too.
I have sendmail running on my centOS 4.6. My lamp server also runs on it. I want to send mail through php mail function. when i execute php page, which fires the mail function, it takes so much long tim1 say even 1 minute, and at last displays that message sent successfully. Suppose, destination address is [URL].... I did not get any mail there. My server is running in LAN. I checked the status of sendmail, it shows me that it ios running. when i issue "nmap localhost" it shows me that SMTP port 25 is open, but when i issue "nmap myserver" (192.168.1.20 myserver ( written in hostfile)), it does not show that SMTP port is open.
I checked the /var/log/maillog, one person in my previous post advice me to see that. There it shows that message is accepted for delivery...but i do not get any mail in my destination, even not in spam folder. One more confusion is that, in my case my server is in LAN and if I am at all enable to open the SMTP port on it, does i need to open SMTP port on my router (which connects my LAN to internet) also needs to open? I think no, because SMTP is application layer protocol, it will wrap my mail in IP packet, which router just need to forward. am i right?
I only began using Linux with the release of FC8. I've upgraded into every new version (upgrade, no clean installs), after the new versions had been out a while. I struggle with command lines, updates, cups and other very cool tools that are only difficult because they have so many options. I'm Windows guy at work, a system admin and db administrator, plus the company expert on Excel. But, all in all, I hate Windows, and I'm loving Fedora, even if I struggle.
This last upgrade really kicked me in the pants. The first thing I noticed was all of my software sources were gone. I did some research around the forum and tried a few things, but it's still not working. Unfortunately, I may have uninstalled Yum in the process, but not rpm. I've tried to re-install the yum packages, but still no luck.
This morning before leaving for work I noticed that a boot log indicated that cups had failed. I went in to restart the service (through gui) and it said it was running. So I stopped the service and re-started. I tried to access port 631 through Firefox and it wouldn't open. I need to check the firewall to see if it's an open port, but beyond that I don't know.
Now I'm wondering if I should just do a clean install. I haven't done this, mainly because I didn't want to hassle with setting up my printer again (although, it's a Brother and they have the drivers and good instructions), and I didn't want to lose any emails that I've received via Thunderbird. The printer is really a non-issue now, as I'll have to set it up anyway. I have a backup of the /usr folder and all the documents. Question is, if I restore the Thunderbird folder after a clean install, would it bring back my email?
Ok For some reason I open my ports in security and firewall. I open ssh and other ports and port 7001 for example but when I go to check to see if they are open or try to connect to them. It shows that they are still closed. I am using - [URL] Also yes my ports are open on my router. I know my router works fine with opening ports because I have shoutcast setup on another computer with xp that is currently running. I am willing to pay for who can ever get this fixed for me...
I want to do a simple port redirect, i.e. whatever comes trough whatever interface on port AAAA will get redirected to port BBBBI thought that iptables -t nat -I PREROUTING --source 0/0 --destination 0/0 -p tcp --dport AAAA -j REDIRECT --to-ports BBBBhowever it doesn't work, e.g. nc -v -w2 -z localhost AAAA gives:
nc: connect to localhost port AAAA (tcp) failed: Connection refused while nc -v -w2 -z localhost BBBB