Ubuntu Servers :: Check If A Port Is Open For A Ip?
Sep 8, 2010Is it possible to check if a particular port is open for a particular ip in the terminal?
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Fedora Servers :: Open Port Check Tool?
Feb 25, 2009I tried to see if my port was open but got a message saying Error: I could not see your service on 58.164.165.88 on port (80) Reason: Connection refused could someone us out here
View 2 Replies View RelatedServers :: Can I Open Port On Ubuntu 9
Oct 11, 2010I 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)"
Ubuntu Servers :: Ssh Is Running But Port 22 Not Open
Jul 10, 2010I 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.
Ubuntu Servers :: Connection On Port 143 - Iptables Are Open?
Feb 2, 2010I 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
Ubuntu Servers :: Xinetd 754/tcp Kerberos Propagation Port Can't Open?
Apr 6, 2010I can't open 754/tcp por for kerberos propagation, the service is krb_prop.The file /etc/xinetd.conf:
Code:
defaults
{
[code]....
Networking :: How To Open A Port - Failed To Open The TCP Port Number In The License
Jun 20, 2009I am running lmgrd on CentOS5, but it returns Failed to open the TCP port number in the license. The port is 27000, how can I open that port?
View 5 Replies View RelatedUbuntu Servers :: Port 21 Reported Open By Nmap And Netcat, But Blocked By Iptables?
Oct 11, 2010Strange 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.
View 1 Replies View RelatedSecurity :: Iptables: Verify Traffic On Port To Check If It Is Legitimate For That Port?
Apr 18, 2011Is 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.
Server :: If Forward A Port In Iptables, Does The Port Have To Be Open On The Firewall
Aug 5, 2009If I forward port 80 to port 3128 for squid with an iptable rule, does port 3128 have to be open on the firewall or is this all routed behind the firewall?
View 4 Replies View RelatedServer :: Open SMTP Port On Router (which Connects LAN To Internet) Also Needs To Open?
Apr 14, 2010I 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?
CentOS 5 :: Open Port 7001 But It Doesn't Show That Its Open?
Sep 26, 2010Ok 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 open the ports in graphical mode.
Networking :: How To Check What Program Is Using Port
Sep 6, 2010I want to check what program is using some ports. I have
Code:
netstat -a | grep localhost
tcp 0 0 localhost:58935 localhost:www ESTABLISHED
tcp6 355 0 localhost:www localhost:58935 ESTABLISHED
udp 0 0 localhost:53888 localhost:53888 ESTABLISHED
I try ps aux | grep 53888. What other command can I use?
General :: How To Check Port 3306
Mar 10, 2010How do I check port 3306 to see if it is being used? I am unable to get MySQL to run with a LAMPP 1.7.3a installedon Ubuntu 9.10. The Apache server and ProFTPD start fine.
View 2 Replies View RelatedSoftware :: Check If A Port Is Allowed In Iptables?
Aug 23, 2010I want to check if a port is allowed in iptables. How to do this?
View 5 Replies View RelatedHardware :: Check The Status Of A Switch Though Serial Port?
Oct 20, 2010I would need to monitor the status of an electric relay. To do so I was thinking the serial port and perl (as I don't know C ) how to check if a switch connected to a serial port is open or closed. Here is my plan, I'll plug a electric relay on the electric network and monitor the state of the switch. if the switch is closed, that mean that we are on the electric network if the switch is open that mean that we are on our diesel power generator.
PS: There will be no voltage input involve (although I can if that's required)
I'm planning to use this with Nagios to know if we are on the electric network or on our diesel power generator.
Security :: SSH Time Out On Login Attempt From Remote Box: Command Needed To Check Port 22?
Dec 1, 2010I have set up a user to login remotely to our Red Hat 5 server via SSH. A rule in our department firewall enables this user to login from a single static ip address. The ssh port on our server is 22. I am able to login to port 22 from locations within our department firewall. Our administrator says the firewall configuration is unchanged. The remote user had been successful logging in. But now the remote user gets a Connection Timed Out message, before being asked to authenticate by the server.
I regenerated security keys, but the remote user still gets the connection timed out message. (I can login locally with the new keys). I suspect either a firewall or an authentication problem--inclining a firewall problem. Am I correct? Is there a Linux command to check whether port 22 is available or blocked, prior even to authentication, for login from the user's remote location?
Ubuntu :: Check Last User On File Open?
Jun 22, 2011I know there's no direct way to do this. But can someone please suggest how I'm able to check the last user that opened a file?eg; vi test.txtThe last user that accessed test.txtI know last access/mod/change time can be displayed.Also lsof won't do anything as the script I'll be writing won't necessarily be running when the user has already closed the file
View 4 Replies View RelatedUbuntu :: Open Office Spell Check Not Working
Mar 4, 2010Im running open office 3.0 and in ubuntu 8.10 32bit. cant get spell chect to work at all....
View 3 Replies View RelatedUbuntu Networking :: Cannot Open Port 80
May 23, 2010I just installed apache. I didn't change the configuration files at all except add Quote: # added servername to avoid the could not determine fqdn error ServerName myname.homelinux.org to apache2.conf. Apache is working locally (I get the `it's working' screen at [URL]). However, I cannot access my computer from an external computer by going to [URL], which is equivalent to [URL] -- [IP address changed slightly for privacy] Here is a screenshot to my router settings. I disabled the filter for port 80 on the router. here shouldn't be a firewall, unless it's automatically installed with ubuntu 10.4. (sudo ufw status says `inactive'.)
I checked my ports from [URL] and indeed port 22 is open (ssh-ing into my computer externally is not a problem), whereas port 80 is closed. What step in opening up port 80 am I missing? (I also made sure my ISP isn't blocking port 80.)
Ubuntu :: Cannot Open Port 5900
Sep 17, 2010I am trying to access my desktop remotely via VNC. I can already access my computer using ssh, and I managed to open port 22 on my router:
Now I must open port 5900 for VNC, and I think I did exactly the same thing:
Using [url](a port check service), however, my port 22 is OPEN and my port 5900 is CLOSED. Yes, I restarted my router after making the changes.
General :: Set Ubuntu To Open One Port?
Dec 12, 2009I heard when running Ubuntu I need to set it to open with one port. I had a friend ran Ubuntu on his laptop at school and had other Ubuntu users at school got access to his computer, is that possible?
View 2 Replies View RelatedUbuntu Networking :: Open Ports - How To Explicitly Check IPV4
May 4, 2010Normally I use 'netstat -an' to determine if a daemon is listening on a specific port. The excerpt of this command below doesn't list things like vnc (5900) on ipv4. It does however show it on ipv6. My issue is I want to know how to determine if it is indeed listening on ipv4 as would normally be seen with 0.0.0.0:5900. It would appear that all ipv4 ports are internally being redirected to ipv6. Of course this does simplify things, but it also leaves me unable to reliably determine the ipv4 listening status. How I can tell at a glance if a specific ipv4 port is being listened on? Is there a way to force netstat to list the ipv4 listens specifically?
Code:
art@eee1:/proc/sys/net/ipv6$ netstat -an
Active Internet connections (servers and established) .....
Ubuntu :: Crash - Disc Check Hangs Then Browser Won't Open
Feb 1, 2011Running Maverick on my desktop. Had a strange happening sometime last night. I generally leave the computer on all the time. When I got up this morning, I saw that my computer had rebooted and it said that it wanted to check for disc errors and that there was a problem with /home It checked until about 70%, at which point it stopped advancing for a half hour, so I did a hard reboot and choose "I"gnore when I got the message again.
The computer booted fine. The disc manager gui seemed to think my hard drive is fine, but I didn't do the full, slow check. My hard drive is about a month old. When I opened "open office" there as a document to recover, indicating that the thing did in fact crash sometime last night. The next odd thing- my "Opera" web browser doesn't open the browser. The command it is calling up is "/usr/bin/opera %U" Doesn't do anything, nothing shows up as running in the status monitor. Rebooting doesn't change anything with opera, and I still get the request to do a disc scan and to try to fix errors.
I uninstalled and reinstalled the latest version of opera. I uninstalled that and installed an earlier version of opera. Then, I reinstalled the latest version of opera. In terminal, typing "opera" gives me the message: Could not initialize Opera. Typing "sudo opera" opens Opera. Using the icon to open opera still points to the same place, and still doesn't work. So, here are my questions:
1- How do I get a logfile of the crash that happened last night?
2- How do I figure out if there is a problem with the /home folder or a problem otherwise with my hard disc? How do I fix that?
3- Where would I point the "opera" icon so it opens normally?
4- Is there any way to recover the information that I previously had in Opera, such as passwords? I used "my opera" to recover my latest bookmarks, but that doesn't save passwords. I'm thinking maybe those files are still around, even though I uninstalled and reinstalled opera.
Ubuntu Networking :: Open A Port For VirtualBox OSE?
Mar 13, 2010needing to open a port in ubuntu, then use it for my VirtualBox Pc.My VirtualBox is running - Windows XP I have a router connected to my network - Linksys WRT54G Now lets begin, I have tried opening via there router homepage. But when I go to [URL] and test port 4900 is still says that it is closed.
View 3 Replies View RelatedUbuntu Security :: Tor Open Port 23 For Telnet
Apr 24, 2010Tor open port 23 for telnet. Is this normal ?
View 3 Replies View RelatedUbuntu Networking :: Port Will Not Open Regardless Of Methods
Aug 18, 2010No matter what I do, i cannot get port 3100 to open. This is for a new MMO i am CBT on. I know it works on windows because that is how I installed it and played. But I prefer being on Linux. Majority of all other MMOs work fine. Just this one has to have udp 3100 open.
The following is a rough output of all the methods I have tried with no success. As you can see I have done some extensive research first before posting here.
Now its become a lil bit of an obsession.
I cannot get the following command to work:
And yes I tried the "spaces" in different places thinking that was the prob. So i cannot see if 3100 is in the list or not
I eventually turned on the firewall "ufw enable" add the port there, and output:
Some references
[url]
Firewall stuff: [url]
I even manually went into the router and turned it on there.
I add these lines for startup purposes.
Do I need to do something in "wine" ?
I feel i am starting to repease myself
results of "iptables -L"
Code:
Ubuntu Networking :: Open Port 22 In The Router?
Dec 16, 2010I have an n900 phone and I'm trying to ssh to my desktop but I'm getting an error:
ssh: connect to host 58.xx.xx.xx port 22: Connection refused
I recently started using a router for I wanted to connect to net even with n900. I've tried to open the port from the setup page of the router however it doesn't seem to work. (find below the screenshot of setup page).
I've tried to ssh through slackware I've got as a virtual machine and I have the same problem although I was able to ssh through slackware before I started using the router.
Ubuntu Security :: Iptables Port 25 Is Open
Feb 28, 2011I've recently installed 10.10 server edition, and I must say it was a pleasant suprise, it's just the way I like it. I use it as a squeezebox-server. But I've run into a problem with the firewall. I did a portscan, which told me there are more ports open then I've told UFW to open. Among which port 25 and 119, when I telnet from another PC to those ports, the connection gets accepted, although there is no answer to any commands (as expected, there's no mail server running). Iptables print-outs also don't mention anything about the respective ports or a daemon that could be responsable, and the same applies to "ps -e" or "ps aux".
Iptables seems to be working, when I remove the rules to allow samba to work, I can't reach the shares, and when I insert them again I can reach the shares. "sudo ufw deny from any" as last rule doesn't change anything either (deny incoming is default (although I never issued the command "ufw status verbose" says it is) so it shouldn't, but ports 25 and 119 shouldn't be open either).
Fedora :: Check The Box For 'always Open In Browser Windows'
Sep 16, 2009I'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.
