A netmap scan of my WAN IP address (cable modem) shows;
23/tcp open telnet?
8080/tcp open tcpwrapped
I've called Linksys and Netgear and they have said there is no user adjustable configuration allowed for the Cable Modems.
How am I supposed to close the open ports if the manufacturer doesn't allow access ?
I got a new cable modem so I could get rid of the one I've been leasing from the cable company. It is a Motorola sb6120. Everything is fine with the ISP, it's approved for operation on their network, the only hitch was I had to use my Windows laptop to run their activation software.
At any rate, with the new modem installed, I hop on my Linux box and go to work. I'm seeing some terrible delays in looking up names. When I look with firebug, all the dns lookups for new names are taking 15+ seconds. First I just think maybe the names aren't cached or something is weird for a minute and it will get better, but no. After several restarts and then a couple days persevering with the new cable modem, all DNS queries are still terribly slow (including zypper, mail client, web client).
Suddenly I remember an issue I was having with, I believe version 11.1 when I first installed it. For just the computer on my network with a fixed IP address, DNS resolution was slow like this and if I disabled IPv6 then all was well. I believe there was even a patch issued back then for gethostbyname() that was supposed to fix the issue? So, when I disable IPv6, DNS lookup is back to normal. The two Linux computers on my network had been working fine with IPv6 and the old modem, though, and the Windows box is still working fine even with the new modem.
I can disable IPv6 and make it fast again, but really why should I have to?
Linux box could act as a router? I have one machine running ubuntu, another running windows 7, a cable modem and a switch. Is it posible to share the connection between both computers by making the linux box a "router"?
View 7 Replies View RelatedI am using ububntu 9.10,and have a cable modem internet connection. All I have is an ethernet cable given to me,and when plugged in a windows machine and fire a browser am redirected to default login page where i can login, but when i plug it into my linux machine,i cant get the same done. In network connections it doesnt shows my autoeth0, i have deleted my existing dsl settings(not autoeth0),made a new wired network,i doubt what should i put into MAC addrs field(i have put my machines mac given by lshw -c network.) What should I put in DHCP client id? Anyways when i click on network connections it says under my wired connections-device not configured properly.
View 6 Replies View RelatedI have a CentOS system running. I want to get mail off it to my yahoo account.
I did a test mailx command and it goes out of the queue but never gets to my yahoo mail.
I am using a cable modem.
I can go out to the Internet so I know I have a valid connection.
I am guessing I need to set something up so the cable company will relay my mail for me.
I know i can pull pop mail down and sen it using my account.
Do I need to configure something in the sendmail.cf file to do this?
I just went into my email and say this ...patial msg included...
(reason: 553 5.7.1 [BL21] Connections will not be accepted from 98.249.136.1 9, because the ip is in Spamhaus's list; see [url])
I installed slackware 13.1 a couple of days ago. I am a complete linux newbie..I am able to connect to internet from windows using the USB cable of my modem..but this modem is not detected in linux..is there any option to make linux detect it?
I have a pentium 3, 1 GHz processor 256 RAM..and the info below i got from my terminal..
lsusb output
Code:
Code:
And here is some information about my modem
Code:
Features:
-Complies with IEEE 802.3, IEEE 802.3u standards
-One 10/100Mbps auto-negotiation RJ45 port supporting auto MDI/MDIX, 1 RJ11 port, 1 USB port
-Built-in firewall
-Compatible with major ISP lines
-Fast internet access
-Supports bridge and NAT router mode
-Complies with ADSL protocols (ADSL/ADSL2/ADSL2+)
-Easy configuration
-Quick response semi-conductive surge protect circuit, provides reliable ESD and surge-protect function
-Supports firmware upgrade
-Built-in DHCP server
I have been testing with "Add a physical serial port in Polled Mode to a VM using a Null Modem cable".I have been using HP ILOM for a while and need u guys help with "can I Connect the null modem serial cable from server port to the desktop which act as a terminal through ilom?
View 1 Replies View RelatedI am trying to open the telnet port on my system with port 4100 and for the same i have inserted the entries in iptables file using below command./sbin/iptables -A INPUT -s 132.186.208.83/24 -p tcp �-dport 4100 -j ACCEPT.
View 1 Replies View RelatedI'm trying to test smtp connectivity to my postfix configuration and I can telnet to port 25 from the computer itself but cannot from the outside. I get a connection refused error message. What am I doing wrong? I believe my dns is setup correctly as it seems the telnet can hit the box so I'm fairly sure its not that.
View 14 Replies View RelatedI am writing a simple script which will transmit files over a serial connection. I have simplified the setup to test the solution, so the final configuration will be a bit more complicated.
Current setup:
1. 2 RS232 com ports connected with a null modem in between.
2. Open minicom on both
3. Put in 19200,8,N,1 as parameters
4. Open text travels both ways
5. Files sent over Zmodem transfer well.
Both serial adapters are USB, but I tried it also with real com ports, and same story. For simplicity, I will call one adapter "receiving" and the other "sending" to signify from which side I want to send the files through zmodem.
Then I close minicom on the "sending" site without reseting the port (I have also tried setting everything up with stty)
On sending site:
Code:
I tried googling but no solution helps. Please do not try to suggest to use minicom on both sides, because this is going to be an unattended process in the end.
How to transfer a file with zmodem using rz and sz without minicom.
I am using a cable modem wired to my PC via ethernet. My ISP is Road Runner, through Time Warner Cable.
I entered my IP address, Netmask, and DNS Servers into the network, not using DHCP. This was how I was able to achieve a network connection.
I am connected to the modem, but I cannot get internet.
Here are my stats:
Ubuntu and Xubuntu read my Motorola Surfboard SBV5120 cable modem via USB "out of the box"; Puppy LInux doesn't. The computer I've run them on doesn't support ethernet, so it has to be via USB. what can I do to get Puppy online?
Computer: Systemax
Processor: AMD athlon
Memory: 189 Mb
Hard drive: 40 Gb
Sent an email by using telnet on port 25 from the terminal. Telnet states my message was sent but I never got it. Is it on the hard disk somewhere. Is there a log file? Where did my email go? Did it go into the ehter? I opened port 25 on my firewall through gnome by selecting 25/smpt checkbox as a trusted service.
View 8 Replies View RelatedTor open port 23 for telnet. Is this normal ?
View 3 Replies View RelatedIn a remote machine port 25 is open its enabled in firewall also...but not able to connect through telnet..why ?
netstat -an | grep 25
Code:
tcp 0 0 0.0.0.0:44525 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
[code]....
Code:
telnet 172.17.65.206 25
Trying 172.17.65.206...
telnet: connect to address 172.17.65.206: No route to host
I have been trying all day today to setup a sendmail SMTP server on our Red Hat 5.5 dev box. We have 2 network cards, 1 to the local network with a 192.168 prefix and an external card which goes out to the web through a BT leased line through a Cisco router.
First I followed one of the many helpful tutorials online to setup sendmail, installed all the required packages and made a couple of small config changes to allow the service to listen on all IP addresses rather than just the localhost 127.0.0.1.
The main change is in the /etc/mail/sendmail.mc file where I have changed the following line;
DAEMON_OPTIONS(`Port=smtp,Addr=x.x.x.x, Name=MTA')dnl
I have tried removing Addr completely, setting to either the local or external IP and then rebuilding the sendmail file using 'make -C /etc/mail' and then restarting using 'service sendmail restart'
The SMTP port has been added into the firewall and it is showing to be listening on IP 0.0.0.0:25 which I believe means it is listening on all IP's assigned to the machine, sendmail is also in listen mode and running correctly.
Finally I have changed the /etc/mail/access file to include the local IP range 192.168 and external IP range and rebuilt this into the /etc/mail/access.db file and then restarted sendmail.
Googling the error all the sites I have found talk about making sure the 'DAEMON_OPTIONS(`Port=smtp,Addr=x.x.x.x, Name=MTA')dnl' line is uncommented and not much else in terms of what else might be incorrect.
I am starting to run out of ideas on things to change or check, telnet works correctly on other ports on the same server, ie httpd for apache on port 80. I have also rebooted the server to make sure that it wasn't something odd happening.
I cannot connect my Dell Inspiron 1300 through the NetworkManager "wired" connection, when I try to go direct to the cable modem. It fails to connect.
If I connect the cable modem to my (linksys WRT54GS) wireless router, and then connect my laptop to a wired port in the router, it connects in seconds, successfully.
This has happened to me 2 other times, when I tried to connect my laptop to a client's cable modem, because my client did not have a wireless router available, in their home.
My wireless works fine. This has me perplexed. I'm using Ubuntu 10.04 LTS and NetworkManager Applet 0.8
I've tried some things to see what is going on, such as "ifconfig" "dhclient" as well as modifying the "Auto eth0" parameters and adding my laptop's MAC address, etc. Results were no fix or solution. I feel like I'm headed down the wrong road. Would someone set me straight? I have a feeling this is simpler than I think.
Do I have to actually reset my own or someone's cable modem to get this to work? I don't want to do that unless there's no other way. Is there? Let me know what commands I can or should run.
I have fedora 12 installed in my laptop. Can anyone plz tell me how to connect nokia E51's modem ( via. Data Cable) to access GPRS !
View 2 Replies View RelatedRunning 2.6.29-gentoo-r1 on a Sun Ultrasparc 10 with a Sun Happy Meal on eth0 connected directly to my cable modem. Intermittently, with a frequency between a few hours and a few days, I lose internet connectivity. Running ifconfig eth0 indicates all is well and I have a valid IP address but I cannot even ping the cable modem's management address; pings to 127.0.0.1 and eth0's IP address do get a reply but no other address I've tried does. I can 'fix' the problem by issuing
Code:
If I check the CM logs, it appears that it has rebooted itself prior to the loss of connectivity. The strange thing is that the incoming traffic doesn't seem to be affected by this, my PSAD log is full of incoming scans even during the periods when I can't connect to the net. I suspect this is an ISP problem (they own the CM);
Running Gentoo with kernel 2.6.29 on a Sparc Ultra 10. I'm having problems with my cable modem connection failing, so I've added a static route that enables me to log into the modem's diagnostics page at 192.168.100.1 when the connection drops; my /etc/conf.d/net looks like this (with the comment lines removed).
Code:
dns_domain_lo="MYNETWORK"
config_eth1=("192.168.0.1 netmask 255.255.255.0 broadcast 192.168.0.255")
config_eth0=("dhcp")
routes_eth0=(
"192.168.100.1/32 via 0.0.0.0"
) dhcpcd_eth0="-N"
This works but after a period of several hours to several days, this static route disappears from the routing table.
I have a customer who is complaining that they can connect to prt y on IP x with telnet. They are seeing the following:
telnet x.x.x.x y
Trying x.x.x.x...
Connected to x.x.x.x.
Escape character is '^]'.
after some time the connection of course times out. Connection closed by foreign host. There is no telnet service running on this port so they cannot do anything, but they are complaining tht the fact that telnet "connects" is a security risk. I am having difficulty explaining why they are able to connect with telnet. I know it has to do with the socket layer API in Linux but I am having difficulty explaining this sufficiently. I also can't just say "this is the way linux works" to them. I am looking through "UNIX Network Programming" by W.
Is it possible to restrict telnet connection from remote to my server(linux -centos5)?
=================
Ex : [root@localhost]# telnet 10.0.0.33 80
Trying 10.0.0.33...
[code]...
Right now I am using some software to emulate a null modem serial cable on my Windows computer connected to itself. For development purposes I need to have a null modem connection to a linux computer from a windows host. Is there any method of doing this virtually?
View 2 Replies View Relatedi'm having problems connecting to the internet unless i manually enter the IP info.
automatic DHCP does not work. I'm on a dual boot machine vista/ubuntu 10.04 LTS connecting to the internet through a lynksys wireless g router and a cable modem.
I snaptic installed xmacro. I do not see it show up anywhere. Lost. I need a macro that can record keystrokes to reset my cable/router modem combo. I now use autohotkey. But I cannot virtual machine this, because it would need to raise up a ms windows explorer, something that cannot be done in a virtual machine on guest OS.
View 1 Replies View RelatedMy broadband internet connection came with a Nokia-Seimens C2110 Adsl modem. Please help me connect the modem through USB cable as the ethernet card is used to connect my computer(Asus- P5RD2 VM motherboard) to a different computer on LAN. I am in a fix and have no clue how to proceed.
View 1 Replies View RelatedSo first off, it probably seems this question has been asked thousands of times before. but I did do a search, mostly archived posts that ended up being something other than a true ip blocking of the port. [URL]..
So my port 80 is truly blocked. Ive tried setting up the port forwarding on my router, Ive tried manually allowing all traffic on port 80 through ip tables. Ive even dabbled with setting up something like openDNS to see So far nothing, Im only available on my local network.
There has to be some way to do a redirect though. even something as simple as an htaccess file redirecting [URL].. xxxx (the space is there to avoid my url being interrupted by a smiley
I'm trying to capture incoming/outgoing phone call data. Both telnet and nc have allowed me to easily direct this data to a file for later processing, HOWEVER I can't seem to get either to work as a background process. I want to put the connection into a shell script and run from cron.
View 4 Replies View RelatedI installed ZTE MF 626 modem in my F10 with kernel 2.6.27.12-170, i run usb_modeswitch and so far things happened normally. Watching through /var/log/messages it says that F10 detects two port device for this modem: ttyUSB1 and ttyUSB2, and in the sequence it disable port ttyUSB1 BUT Network Manager still set this port.I mean, when i connect via wvdial appointing to ttyUSB2 i get connection, but Network Manager fails to do it appointing to ttyUSB1. How to change device port in Network Manager?
View 1 Replies View RelatedI have upgraded from 9.04 to 10.04. 9.04 found my usb connected printer ( LaserJet 6MP) with no problems. But 10.04 will not find the usb port to which my printer is connected. I have searched for a solution on the forum, and others seem to have a similar problem, but not recognized it. For some it seemed to have self corrected, but I am having no such luck. I have downloaded hplip from [URL]
Following their instructions, I have run "hp-setup" in Terminal. This gives the following output:
Code:
cs@cs-desktop:~$ hp-setup
HP Linux Imaging and Printing System (ver. 3.10.5)
Printer/Fax Setup Utility ver. 9.0
Copyright (c) 2001-9 Hewlett-Packard Development Company, LP
This software comes with absolutely No warning. This is free software, and you are welcome to distribute it under certain conditions. See COPYING file for more details.
Searching... (bus=usb, search=(None), desc=0)
error: No devices found on bus: usb
After disconnecting and reconnecting the printer cable, I used the command "dmseg| tail"
Terminal output:
Code:
s@cs-desktop:~$ dmesg | tail
[263.646972] Buffer I/O error on device fd0, logical block 0
[301.759023] end_request: I/O error, dev fd0, sector 0
[301.759033] Buffer I/O error on device fd0, logical block 0
[339.871189] end_request: I/O error, dev fd0, sector 0
[339.871199] Buffer I/O error on device fd0, logical block 0
[349.600055] usb 2-1: USB disconnect, address 2
[349.600258] usblp0: removed
[361.712024] usb 2-1: new full speed USB device using uhci_hcd and address 3
[361.869251] usb 2-1: configuration #1 chosen from 1 choice
[ 361.884062] usblp0: USB Bidirectional printer dev 3 if 0 alt 1 proto 2 vid 0x050D pid 0x0002
I interpret this to mean that the printer is seen from this command. Yet when I do the "lsusb" command, I get this output:
Code:
s@cs-desktop:~$ lsusb
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 003: ID 050d:0002 Belkin Components
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
This to me indicates that the printer is not seen by the "lsusb" command.
I would like to get my printer printing. I am trying to get hold of an older parallel Centronics printer cable with a DB25 at the other end to see if I can get the printer working with it. Have others done this with success?