I see when going to websites in firefox that they resolve to 1.0.0.0 on port 80. I added the ISP's nameserver to /etc/resolv.conf as below. Also configured my router to give the client;s the ISP's DNS server, but it's intermittent.. Some pages load, then when refreshing some time later, they fail again.
cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 203.0.178.191
I have a peculular routing problem on my hands. I have a server running in my office. it has various services running on it (httpd sshd etc.) in order to access these services I have a domain name pointing to my IP.If I try to connect to the server from an external IP, all is fine and working as normal.However, if I am connecting from the interal lan to the server, my domain name resolves to the address of the routerSo for instance everywhere on the interent my domain name resolves to the correct external IP (12.23.34.45) which is then connecting through my cable modem (12.23.34.45) to my router (192.168.55.66) and directed to my server (80.80.80.80)however if I resolve my domain from within my lan, I get my routers ip 192.168.55.66 so trying to connect to my server times out while connection to the wrong device.My network setup is very simple. nothing fancy.I think I'm using google's 8.8.8.8 for my dns server
Code:
Network Diagram
/> SERVER
[code]....
I have a home server running Ubuntu Server 10.10, it is running Samba for file sharing with a mix of Windows and Linux boxes in my house. My main problem is that the server is only accessible by IP or by using hostname.local, but it is not possible to connect to it by just typing the hostname. Further more, it is not being automatically discovered and listed by Windows or Linux clients.
What's really odd is that I also have an Ubuntu Desktop 10.10 install on a separate computer, and that computer is accessible using just the hostname and is automatically being discovered and listed by other computers.
What is missing on the server? What is responsible for resolving just hostname, avahi seems to only deal with hostname.local and that is working fine. I also compared the samba config of the desktop and server Ubuntu installs but wasn't able to find any setting that would be influencing this. Is there some package I'm missing on the server?
For example, given the range:172.128.0.0 - 172.191.255.255I need to find some domain that resolves to an IP-adress within the range. Is it possible ? I'm using a Linux system.
View 3 Replies View RelatedI'd really like to know how to port forward firefox, so I can browse and stream my movies faster... is this possible?
View 8 Replies View RelatedHow do I change the ports that something like xchat uses to make it use the same port as firefox? I am currently somewhere that has all non browser ports blocked.
View 1 Replies View RelatedI 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
[code]....
I have a Suse 11.2 machine named "susepc" on a network with some other windows machines. From the Suse 11.2 machine, I try ping winpchere winpc is the name of a windows machine on the LAN but the name resolves to an odd ip address:PING winpc.HOMENET (72.215.225.9)he "HOMENET" is the correct name of the windows workgroup, but the ip address is completely wrong. My LAN is based on 10.20.x.x and the winpc ip address should be 10.20.0.100. I can "ping 10.20.0.100" and it works correctly.Some things:- DHCP server is on the router- pinging from winpc to susepc works perfectly ("ping susepc" resolves to the correct IP address 10.20.0.101 and the pings respond)- "net view" on winpc lists the susepc - SAMBA is installed on susepc- the Netbios name is set to susepc- I have a shared folder on susepc that I can see, create files in, etc. on winpc with no problems.- IPV6 is disabled on susepc- I have tried setting up susepc as a WINS server (Wins Support)
- I have tried setting up susepc as a Local Network Browser
This applies to my 2 opensuse PC's, my Windows PC is fine.I can ping a hostname, say "PC1" but I can not ping PC1.domain.local (even the host PC can not ping it's own FQDN). When I ping just the hostname the ping stats even list the FQDN.Onto the next issue, since all my PC's, have the domain prefix domain.local, my Synology can not. I can ping it's IP and that is it. I can resolve it's name with nmblookup just fine tho and that is what is killing me. How is this not resolving.Even weirder, I can browse to "Synology" in Network Servers under places on the slab.
View 3 Replies View RelatedI had no problem installing Ziproxy, as its in the main packages But how to use it? I mean, so far I could find out, to start it, I musst run:ziproxy --daemon ([URL]) My /etc/ziproxy/ziproxy.conf is full of stuff I've found on internet:
[Code]....
But when I run it, and set the Firefox port to:9900 it fails to load any website. The goal is to compress to the maximum the images, and other stuff that uses too much bandwich (like Opera Turbo). I really dont care if a picture is full of pixels, or not. I do not want to use Opera, just to enjoy a fast Internet. I will not install Midori, Iron, Chrome, eLink or Arora. I want to continue with my usual Firefox and opera. The advantage is that in Firefox, I have NoScript, and other several improvements/extensions, which I cant enjoy in Opera.
I think the fault is, to include four different parameters (Address,Port,NextProxy,NextPort) that are probably for the same thing. Also had thought that perhaps there is some way to apply the proxy system-wide, not only in the Firefox settings. Maybe by editing the configuration of Networkmanager?
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?
I have a mail server i need it to send message via port 587 not port 25, i make some changes to my postfix server which i use and it is already successed making a telnet to 587 port like it :
[Code]....
sudo ssh -L 750:192.168.123.103:873 username@192.168.123.103It does exactly what it's supposed to do, but how do i edit / remove this rule?Is there some config file where i can alter the forwarding? How does it get stored?Im using Ubuntu 10.10Server Edition (allthough i recon it would be pretty much the same across all versions
View 5 Replies View RelatedI'm not that great with mailservers, and just been thrown a curveball with a MS Exchange environment for which there is apparently no solution... yeah, right. But is there a workaround?
The problem is that the site mail (SMTP) needs to be sent via port 26 instead of the commonly used 25. Port 25 is mapped to a mailfilter, which apparently causes havoc with some of the mail, and the techs that have been on site trying to coax the Exchange server to co-operate have said that the only way would be to get rid of the filter.
The problem is that there are number of apps that are unable to have the outgoing port changed and so keep sending mail out on port 25.
I look after the Unix/Linux side of things at work, and I was wondering if there was an easy way to set up a Ubuntu box to receive mail on port 25 and just forward it to the MS box on port 26? So, in other words (and I hope this makes sense): monitor port 25, and forward whatever comes in on port 25 to the server on port 26. Simple portforwarding, or is it? What steps do I need to take?
When I use the following command:
ssh user@ssh_server -L 5500:localhost:5500 -p 22
everything works fine. I can log in, and local port forwarding is done. Otherwise when I use the command:
ssh user@ssh_server -R 5500:localhost:5500 -p 22
I get an error "remote port forwarding failed for listen port 5500". However when I try remote port forwarding in WinXP by use of putty there is no problem...
I want to set my ip as static and port forward it through a specific port can anyone help me with this im using ubuntu 10 with 64 bit OS
View 1 Replies View Relatedi want if a port (exp. 1001) have 20 connections that the next new connection forword to an other port (exp. 1002).
View 2 Replies View RelatedVERY new to linux, erm but I have an issue that needs solving!I recently moved to university, where their network blocks sftp port 22, this means that I cannot connect to my FTP server which is running a version of linux.Now I've got this ftp server connected to a seedbox and it was created using the following walk through..Code:I have written this guide for a friend, but I though it would be useful for others as well.
There are several guides floating around, but I found that most always cock up in some way. This one is tried and tested to work on Debian Etch (on an OVH rps, but should apply to most servers).If there is a new stable release of rtorrent/libtorrent then I will update this guide to show you how to update it (without reinstalling the whole server).
At the bottom there are also instructions to install ftp access & some network monitoring software.Basically, I would really like someone to be able to construct the commands on how to change the listen port for sftp connection on linux or add another port to the list that Linux would use so that I could put in through putty.
I tried to make "ssh tunneling", but failed and got this message.
Quote:
Administrator@windstory-PC /
$ ssh -R 7869:localhost:7869 windowsstudy@192.168.0.4
windowsstudy@192.168.0.4's password:
Warning: remote port forwarding failed for listen port 7869 Last login: Wed Jul 21 01:56:04 2010 from 192.168.0.2 -bash-3.2$
1. system environment
192.168.0.2 - windows 7 + copssh
192.168.0.4 - centos 5.4 x86 + openssh
2. Guide for setting "ssh tunneling"
[URL]
3. Added this to sshd.conf
Quote:
AllowTcpForwarding yes
4. "netstat -na|grep 7869" at 192.168.0.4
Quote:
[root:maestro:~]# netstat -na|grep 7869
tcp 0 0 0.0.0.0:7869 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:7869 127.0.0.1:53539 ESTABLISHED
[code]....
5. result of "ssh -vvv -R 7869:localhost:7869 windowsstudy@192.168.0.4"
Quote:
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
[code]....
6. I added 7869 for telnet service as follow;
Quote:
mytelnet 7869/tcp # My Telnet server
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.
I'm trying to use iptables in order to forward all the incoming packets for port 5555 to port 5556 on the same server (192.168.2.101).
I wrote the following commands:
iptables -A PREROUTING -t nat -i any -p tcp --dport 5555 -j DNAT --to 192.168.2.101:5556
iptables -A FORWARD -p tcp -m state --state NEW -d 192.168.2.101 --dport 5556 -j ACCEPT
I'm trying to set rxtxSerial to work so a Java app has access to a serial port (via SiLabs CP210x driver, port /dev/ttyUSB0). When I use update-alternatives --config java, there are 3 alternatives which provide `java'. I have tried openJDK and Sun. Both fail but with completely different messages.
[Code].....
In SuSE firewall0. I do have a openSuse 11.4 and multiple IP addresses on eth0 interface
I run (trying to/have to) multiple TOMCAT servers.
I am trying to have each tomcat instance listen to on separate IP address for example:
What i am trying to do is to redirect
a) tomcat 1 -
a) tomcat 2 -
And so on.
I know that it has to be possible.
I do have just eth0/
Is is it possible. Do I have to create "vittual interfaces"? eth0:1, .......... and do redirection ?
"Server" has got just single interface - just 1 ethernet calbe goes to that server. I am planning to have 10-15 tomcat's on that server (I have to unfortunatley) and each has to run on port 80
Is it possible to "grant" permissions to normal users to run app on port 80 - that would solve me lots of problems if impossible to redirect.
I tried to setcap 'cap_net_bind_service=+ep' /path/to/tomcat ...... but no luck
i am running ncat (netcat's new version from nmap) on centos . I am listening on different ports. My question is , is it possible that when a connection is received on a port say 123, i redirect this connection to a different port and use the 123 port again for listening connections. ncat has an option -k which u can add with -l , it will force fully listen on the port. It can accept multiple connections on a single port but i want that once a client connects on to 123 port, he is forwarded to some other port and no longer on 123.
View 4 Replies View RelatedI'm using a Debian servers, as router/firwall.. I've two ethernet interfaces into the server, one for wan and one for lan. The i use SNAT so my LAN clients can access the internet throgh the debian router. That is working... Now i want to be able to access servers on the LAN site from the WAN site, and i wanna use port address translation (PAT). I have a FTP server running on a lan server, so i'm trying to portward port 21.
iptables -t nat -A PREROUTING -p tcp -i eth1 -d (WANIP) --dport 21 -j DNAT --to 192.168.1.2:21
When people try to access my FTP from the WAN site, they are redirected to the local FTP server, and they are promted for crendentials, but when the credentials are typed, and the local ftp server should answer the wan request, the connections dies.
The wan clients are being promted for credentials, so they are redirected to the local lan server, but after that the connections dies, so i think there is some kind of nat problem, when the local lan server is trying to respond to the wan request..
Here i my iptables script:
#flush table
iptables -F
#input regler
[code]....
I make an application on GNU/Linux which listening on a MULTICAST stream, so I open my unconnected socket, bind it on a MULTICAST address and a port, join the multicast group with the "setsockopt (IP_ADD_MEMBERSHIP)", then I receive datagram on my socket.
Now I've two different instances of the same application that run with their own MULTICAST address and port. And what I found strange is that, after a misconfiguration, I switch the ports, for example:
Emitting on 225.0.0.1/23451 and 225.0.0.2/23452
Receiving on 225.0.0.1/23452 and 225.0.0.2/23451
And my receiving part doesn't care about the MULTICAST address, it looks like the socket is listening on the port number only! I mean that the receiver [225.0.0.1/23452] take its datagrams from emitter [225.0.0.2/23452] and vice-versa!
I'll explain this in one sentence: Is it possible to program a port-binding shellcode in which people across the Internet can connect to, without being thwarted by the router blocking their data because the port its bound to doesn't allow port-forwarding
View 2 Replies View RelatedIf 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 RelatedHow can i redirect data received on a port to another port located in a different machine? Can i do this using IPTABLES ?
View 4 Replies View RelatedI have a mail server on which I would like to block port 25 on my eth0 for everyone except our external spam filter. the problem is that I want our users to be able to connect via port 10025 which is forwarded to port 25, which then is blocked...
View 2 Replies View Related
