Networking :: VoIP And Opening Ports With Recommended Settings

Nov 7, 2009

I have recently bought a IP/PABX system with one FXO and one FXS port. I intend to install this on a remote site with a public but dynamic IP (can be resolved via dyndns though) and make calls via clients that are NATTed (inside a home router). I would like to seek advice on the port opening and the recommended settings. I have been reading a lot on VOIP and I am getting feedback that SIP calls are difficult to establish on a NATTed environment.

1.) SIP port 5060 UDP?
2.) RTP ports - what range should I open for this? I see some use 10000-20000 UDP
3.) STUN server - Is this something that needs to be configured?

How can I ensure that the other party can hear the audio just like a regular telephone? Is it really impossible to do if the client is behind a router in which it is using a Private IP Address? What other network configurations needs to be done?

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Networking :: Opening Ports On Slackware?

Jun 20, 2010

How can I open a p[ort in slackware? I am "trying" to install and use Alfresco, a DMS that runs on linux platforms. So far that has been a nightmare........

Basically, according to their support tech, port 3306 is blocked. I dont really understand because I have MySQL DB server running and listening to 3306 on that machine and no problems at all... However, they recommended to try:

Code:
telnet localhost 3306
or

Code:
telnet <machinename> 3306

but it resulted in:

Code:
telnet connect to address 127.0.0.1: Connection refused

If I understand correctly , the Alfresco support is correct, 3306 is indeed blocked. But how come mysql is running fine then? How can I unblock this port? And finally, I need to specify that I dont have ANY type of firewall or anything like that because this machine is not connected to the web... So if I dont have a firewall , what is blocking the port?

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Networking :: Opening Ports In Debian For Local Net Traffic

Apr 24, 2010

I have a fairly clean install of Debian 5.04 on a G5 tower and am having some local network sharing problems. The machine linuxG5 has an address of 192.168.1.4 and when I am logged into that machine I get the following output

silver@linuxG5:~$ nmap localhost
Starting Nmap 4.62 ( http://nmap.org ) at 2010-04-24 10:19 EDT
Interesting ports on localhost (127.0.0.1):
Not shown: 1706 closed ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
25/tcp open smtp
[Code]...

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Fedora Networking :: Wireless Adapter Not Working At Startup - Works Fine After Opening Settings

Oct 1, 2009

This is my startup routine:

I log on and Network Manager shows no wireless adapter.

I go to System > Administration > Network:

There are two entries in the Devices tab: Wireless and Ethernet

As soon as I double click the Wireless device and the configuration pops up, the device starts working (no changes to the settings are made)

I have the following set to ON:
- Controlled by Network Manager
- Activate device when computer starts
- Allow all users to enable and disable this device

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Ubuntu Installation :: Upgrading With Recommended Apps & Settings?

Oct 8, 2010

I was wondering: Is there a way to upgrade to a new Ubuntu version without completely reinstalling the system and to use the recommended apps and settings of the new version?

Reason I ask is that almost every time I upgraded to a new version by using the update-manager and than later installed that new Ubuntu version on another computer from scratch, I noticed that there are some differences. For example let's say the new version promoted a new UI design or some default apps have been replaced. These changes have not been applied to the upgraded version.

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Software :: Shorewall And Opening Certain Ports?

Aug 27, 2010

I have searched the web for this answer and i can't find it. I'm using Shorewall for my company firewall and all is working well. But i need to tweak down a few problems that i have. Employees have internet connection over a proxy server (http and https traffic), but some do need to connect to other ports not through proxy but directly. I want to add a exception to the rules. For example i want to allow that a local ip can connect to a predefined ip on the net to a specific port. All my attempts have failed.

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Programming :: Opening Ports With Perl?

May 12, 2011

im working on a perl script to automate the setup on a few machines. Does any one know how to open ports using perl?

ps: The systems are redhat so id be editing the iptables file..

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Ubuntu :: Closing And Opening Ports On Schedule?

May 26, 2010

how I can set up something to automatically open port 119 at 10pm and close it again at 3am..

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Ubuntu :: Setting Up Static IP And Opening Ports?

Aug 30, 2010

I am trying to open a tunnel for a friend of mine who's isp has blocked a bunch of webpages, so I was thinking I would learn how to since it might come in handy in the future Anyway, so I looked at a couple of videos about going in to network settings and changing the setting to manual and write down the desired IP (in my case 192.168.0.137). Then I went into my router (it's a D-link DI 524) and tried adding my static IP as the DMZ computer. I then restarted, everything looked fine, the router saved the settings and the eth0 still hade the information saved so I wanted to try it out. I just googled "try my ports" and I found a website called [URL]...But no ports worked for me.. I tried double checking everything, checking for errors. I couldn't find anything so I'm guessing you might have a clue!

EDIT: It seemed I had to have a program that actually used the port for it to work.. It's working anyway, so if you could move it to [SOLVED] I'd be happy

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Ubuntu Servers :: Secure Fileserver Over Internet - Opening Samba Ports Make Default Particularly Vulnerable To Penetration?

May 26, 2011

I'd like to set up a fileserver for myself and a few trusted individuals. I'm computer savvy and I use various linux servers frequently for work, but this is my first time trying to setup my own. Is it possible to have a Samba server setup so it is both secure and facing the Internet? Two questions:

Will opening Samba ports make my default Ubuntu server particularly vulnerable to penetration? More than having an SSH server running? Does Samba/ can Samba be configured to encrypt traffic or is it sent plainly? If so, does Windows and Mac support this secure communication?

If not, what would you suggest? I'd like to achieve something like a network drive and at a difficulty level that my parents could use this if they really wanted to. I will be storing things like financial information and tax returns, but no weapons-grade secrets.

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General :: Firestarter Denying Connections On Ports 80 & 443 Despite Settings

Apr 19, 2011

My firestarter is denying connections on ports 80 and 443, despite the fact that I have set rules to allow both the services, and indeed any connection from my gateway (the source of the connections).

Can someone please advise why this might be?I can surf the 'net fine, unfortunately I cannot load facebook, gmail, or another couple of sites that require logins, and I assume this is due to HTTPS not communicating properly.(On the off chance anyone can answer these real quick, I'm also trying to solve my resolution resetting every time I restart, and one of the icons in my KDE panel turning into a widget from an icon every time I restart. Still working on these, but just if anyone knows already).

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Ubuntu :: Software Center And CompizConfig Settings Manager Not Opening

May 26, 2011

Trying to start software center:

[Code]....

Also, in 11.04 there's a "feature" where if I drag the title bar of a window against the top of the screen, it expands sideways. How do I disable that? I'm guessing I do it in CCSM.

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Networking :: Broad Networking - Video - VOIP And Backups

Jun 12, 2009

My home networking consists of a slackware box, running iptables with a dual NIC. That's the firewall. I have a Netgear FSM 7352S, which is a level 3 switch, which I am currently just using as a switch. Clients are numerous PCs and a couple of networked printers.

The "firewall" machine is also a file server.

Here are the issues I could use some pointers on:

I'd like to assure that the VOIP adapters get priority, assuring QOS, particularly voice quality.

I'd like to provide reasonable priority for video streaming, such as hulu and other sources, that the kids use.

I'd like bulk data transfers (like backing up partitions) to the file server that runs iptables, and acts as the firewall/gateway for a cable internet connection. It would be good to be able to do this without impacting VOIP and video streaming.

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Networking :: Squid ACL For NAT And VoIP Sites

Jul 16, 2011

I just setup a linux machine that act as a gateway along with squid running in transparent mode. Now I have one asterisk server which is behind that gateway I mean on my local subnet which pass through my linux gateway. Voip server having 4mb up n 4 mb down limit. Clients having 512kbps and upload 2mb.

Linux gateway : controlling band width of each clients
Squid acl forNAT issue with voip sites

Now my question is regarding skype calling. Since skype uses port 80, does it mean that it passes its request via proxy or direct and for safe side I've changed skype incoming port to 443 which squid does not see it. How much and width does skype use for calling in that case. Some one told me that it using squid to pass its request which I don't agree.

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Networking :: Old PBX Migration To Jive VOIP PBX?

Apr 15, 2010

I was given a project of installing a new Jive VOIP PBX and will be migrating it from an older Avaya PBX. I need to perform in order to migrate the DID's and extensions and etc from the old system to the new? It is something that I have never done and have been ask to perform a miracle. I have never used JIVE VOIP PBX's and am familiar with Trixbox stuff but for smaller business and nothing of this size.

[URL]

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Networking :: LAN Must Use ISP 2 To Go To Internet And VOiP Server Must Use ISP1?

Nov 8, 2010

I have Ubuntu 10.10 server gateway:

Code:
_______________________________
| ISP1 |<---->|ADSL modem, internal IP 192.168.1.1 |<------->|eth0 IP 192.168.1.10 |
|ubuntu server |
| ISP2 |<--------------------------------------------------->|wimax0,

[code]....

My goal is LAN must use ISP 2 to go to Internet and VOiP server must use ISP1. So, I write some iptables rules:

Code:

#!/bin/sh
#
IPT="/sbin/iptables"
# Internet Interface

[code]....

But there is problem: packets from DMZ network are not natting or may be something else wrong.Also my routing table:

Code:

# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 199 0 0 eth0

[code]....

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Networking :: Quality Of Service Setup For VoIP

Jan 27, 2010

I'm trying to setup QoS for my VoIP line on my debian router box. I have tested wondershaper and to me it doesn't seem to work at all, so I'm looking for a better solution. Ultimately I would like something in the lines of [URL] but I guess such nice things doesn't exist for linux. Currently I'm on an ADSL link switching to cable in a few months.

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Ubuntu Networking :: Capture Voip Data For Skype?

Dec 9, 2010

I'm using tcpdump and tcptrace to track all incoming and outgoing data packets through my network interfaces. But I fail to monitor the voip data for skype that way, although it works well with http port 80, for example.

I want to track the ip address of the data packets for skype, i.e. know the ip address of the other one speaking at the other end of skype. How can I achieve this?

I've checked the port setting in my skype and I'm sure I'm listening on the right port. But nothing is showing up while I'm in connection with skype.

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Ubuntu Networking :: VoIP On Livebox - Connection Timing Out

Jul 17, 2011

I have a complex network. ADSL broadband comes into the house and connects to an Orange Livebox. An Ethernet cable then connects the Livebox to a more powerful router, a DrayTek Vigor 2710Vn. The reason for this is that the Livebox has a second line capability using Voip, but it is not powerful enough to get around my stone house. The DrayTek router has Voip capability, but as yet Orange will not connect the Voip line to it. I connect to this system with Ubuntu. Android, Windows and I-phone. I can connect to either of the routers, though I usually use the DrayTek.

Voip on the Livebox does not require a computer to run it, you just plug a normal phone into it and use it to get free calls. I actually take this line into a Panasonic telephone switch to give me a 2 line system around the house. The problem with this set-up is that after a short time something happens to the network which prevents Ubuntu computers connecting to it. Windows machines, I-phones and Android phones connect, but Ubuntu does not. If I re-boot the Livebox, or in an extreme case take it back to it's factory settings, the Ubuntu machines can connect again, but it's only temporary.

The fact that fixing Livebox sorts the problem definitely points to Ubuntu being innocent, but at the moment I can't do without the Livebox. That means, for the moment, having to stay with Windows. If I post the output log after a failed connection attempt, all it would show is the connection timing out. Why is Ubuntu so sensitive to network problems that are not of it's making. Is there anything I can do about it other than changing my ISP. I am considering that, but other factors make that difficult.

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Networking :: Iptables Script Is Blocking Voip Asterisk?

Jun 5, 2010

I have two asterisk servers each one behind a linux firewall/gw. Linux is Centos 5.4, kernel 2.6.18-164.el5, iptables v1.3.5. Routes on the fws are ok and when iptables is stoped the servers are see each other, all good. But when I run iptables script in any fw, one server (not always the same) goes unreachable. I verify this with asterisk -r, then show sip trunk, and status becomes UNREACHABLE.

Iptables scripts is generated by fwbuilder. The weird part is I put only one rule to de script and it looks like Source=any, Destination=any, Service=any, Interface=any, Direction (Inbound,Outbound)=any, Time=Any, Action=ACCEPT. So as you can see I tried something like "Do not do anything at all". But anyway I run the script in any fw and one server becomes UNREACHABLE. I think the script does something wrong after all or maybe I have some missconfiguration in my asterisk conf files. The point is I am not so expert in iptables or shell scripting so I can't see anything in the iptables script. I have look for some issues like iptables blocking because of ip_conntrack table full, or "dont fragment" bit set in kernel problem, but nothing seems to be the right problem at all.

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Ubuntu Networking :: Why Changing Of Mac Address Not Recommended

Sep 3, 2010

Why changing of mac address isn't recommended? The possible reasons that I can find is:
1) it can break firewalls
2) it can break some DHCP implementations ?
Is there any other reasons that I have missed ?

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Ubuntu Networking :: Recommended Boot Over Network?

Jan 12, 2011

recommend ideal tutorial for boot linux over network

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Fedora Networking :: VoIP Phone Client For 14 - Sound Card Don't Work

Feb 10, 2011

I`m using Fedora 14 and i`ve one problem, i use x-lite phone on windows and what is x-lite alternative for linux ? i`ve found x-lite phone for linux but it dont work fine . It has problems with sound card etc. What do you recommend?

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Ubuntu Networking :: VOIP - Interactive Voice Response And Call Transfer

Aug 2, 2011

I am complete new to the technical side of VOIP. I know above diagram is not technically correct. I want a setup that works like that and oh the cheaper yet not compromising the better, even ekiga or skype can do that.

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Fedora Networking :: Recommended Broadband Internet Provider ?

Apr 5, 2009

Does anybody use successfully a broadband internet service on Fedora 10? I'm seriously thinking of buying a wireless card but don't know if it will be compatible.

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Hardware :: Multiserial Ports Identification / How Many Ports Are There

Dec 17, 2010

I'm writting an app for desktop and embedded linux and I need to get information about the multiserial port, and I need to know which port is been used (by a printer, por example).The multiserial I'm using is an Altera Corporation Device 0004, and I just need to tell how many ports are there and how many is been used.

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Fedora :: System Monitor Not Opening / Thunder Bird Opening But Not Showing Any Folder Including Inbox?

Nov 20, 2010

i am using Fedora 14. Once system get hanged during opening a video file so I had to restart the system by pressing restart button. But after restarting there are few problems appearing like system monitor not opening and Thunder bird opening but not showing any folder including inbox.

---------- Post added at 04:54 AM GMT ---------- Previous post was at 04:42 AM GMT ----------

Looks like SElinux has stopped working

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Networking :: SSH - Forward Several Ports At Once?

May 10, 2011

I can successfully forward a port via:

PHP Code: ssh -L 5900:localhost:5900 test@192.168.5.1 

how do I forward several ports at once. This is a wrong example but:

[Code]...

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Software :: Either Opening This Straight Away Or Saving Then Opening It Comes Back?

Feb 7, 2011

One of the apps I would like to try out is usenext.Selectint the download for the right version (Linux - Suse, Red Hat, Fedora) I get the rpm file.Either opening this straight away or saving then opening it comes back with the following errors:

usenext-5.27-1.i386 requires mono(gdk-sharp) = 2.10.0.0
usenext-5.27-1.i386 requires unrar
usenext-5.27-1.i386 requires mono(glib-sharp) = 2.10.0.0

[code]....

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Fedora Hardware :: Tell If USB Ports Are 2.0 Ports?

Aug 11, 2010

How can I tell if my USB ports are 2.0 ports?

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