Questions[mask](server)

I'm writing a script to extract information from BusyBox v1.25.1/Linux 2.6.36/router where the user can simply run the script and copy/paste the output into a submission form to request support. The script it's essentially a list of commands like route, ifconfig, etc. Because of the busybox implication I'm restricted to /bin/sh.

I'm trying to find a smart way to automatically mask all the public IP addresses only from the output. Replace the full IP would be already good but if it's possible I would be looking for a command to pipe at the end of each command (even an internal function) to simply replace let's say the first two octects e.g. 80.80.80.80 with XX.XX.80.80

A nice to have feature would be to replace the same number of digits to retain formatting where possible. e.g.

8.8.8.8=X.X.X.X 80.80.8.8=XX.XX.X.X 180.180.80.8=XXX.XXX.XX.X

practical example:

root@router:/proc# route | filtering-goes-here Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface XX.XX.168.1 * 255.255.255.255 UH 0 0 0 vlan2 172.16.9.0 * 255.255.255.0 U 0 0 0 br1 10.10.9.0 * 255.255.255.0 U 0 0 0 br0 10.114.126.0 * 255.255.254.0 U 0 0 0 tun11 XX.XX.168.0 * 255.255.252.0 U 0 0 0 vlan2 10.10.0.0 * 255.255.0.0 U 0 0 0 tinc 127.0.0.0 * 255.0.0.0 U 0 0 0 lo default cpc86269 0.0.0.0 UG 0 0 0 vlan2

Thanks!!

I'm trying to foward some domains to another. The scenario is quite easy:

• domain example.com is the primary domain

• the domain example.net should be forwarded to example.com

• all set up subdomains should be as well

As a DNS, my machine is running bind and my configs look like this:

named.conf:

zone "example.com" {
     type master;
     file "/etc/bind/db.example.com";
     notify yes;
     allow-transfer{
         208.79.240.3;
         208.79.241.3;
     };
};

zone "example.net" {
     type master;
     file "/etc/bind/db.example.net";
     notify yes;
     allow-transfer{
         208.79.240.3;
         208.79.241.3;
     };
};

db.example.com:

$TTL    1d
@   IN      SOA     ns.example.com.   dns.example.com.  (
                                    2012021204      ;serial
                                    8H      ; refresh
                                    2H      ; retry
                                    4W      ; expire
                                    1D)     ; minimum
                        IN      NS      ns
                        IN      NS      ns1.rollernet.us.
                        IN      NS      ns2.rollernet.us.
ns                      IN      A       78.46.106.248
ns1.rollernet.us.       IN      A       208.79.240.3
ns2.rollernet.us.       IN      A       208.79.241.3

@                       IN      MX      10      mail
@                       IN      MX      100     mail.rollernet.us.
@                       IN      MX      100     mail2.rollernet.us.
@                       IN      A       78.46.106.248
mail                    IN      A       78.46.106.248
www                     IN      A       78.46.106.248

db.example.net

$TTL    1d
@   IN      SOA     ns.example.net.   dns.example.net.  (
                                       2012021208      ;serial
                                       8H      ; refresh
                                       2H      ; retry
                                       4W      ; expire
                                       1D)     ; minimum
                        IN      NS      ns.example.com.
                        IN      NS      ns1.rollernet.us.
                        IN      NS      ns2.rollernet.us.
ns                      IN      A       78.46.106.248
ns1.rollernet.us.       IN      A       208.79.240.3
ns2.rollernet.us.       IN      A       208.79.241.3
@                       IN      A       78.46.106.246
mail                    IN      CNAME   mail.example.com.
www                     IN      CNAME   www.example.com.

The forwarding works fine so far and all access to (www.)example.net is forwarded to (www.)example.com.

The only thing I am missing is that the address bar in my browser is not switching to (www.)example.com when I'm accessing (www.)example.net. How can I make this happen?

I have a question.

I came across the following situation in a windows server ...

192.168.0.0 mask 255.255.0.0 GTW x . . .

192.168.3.0 mask 255.255.255.0 GTW y

By chance in this scenario there is any possibility of overlapping networks?

192.168.3.0/16 and 192.168.3.0/24 can coexist?

I want to setup a jailed SFTP account for a subfolder of another user's home folder, but want the owner of everything in that subfolder to stay the same, including new files and folders uploaded and created by the sftp user, while still allowing access to the files and folders of that subfolder as if the SFTP user was the parent user.

rawny bawb-sftp /home/rawny <- rawny owns this /home/rawny/sftp <- rawny owns this too, but bawb-sftp can upload to it, edit files, etc

bawb-sftp uploads a file /home/rawny/sftp/lol.txt rawny should still own the file, as if he made it in the first place, even though bawb-sftp was the one that uploaded it.

Basically I guess I'm asking for an sftp jail that acts as a highly limited passthrough/puppet for another user?

Im trying to do a practice in packet tracer. Im configuring a 1841 Router (but the problem happens in all routers).

When I try to set an IP address with a mask different of the by defect mask for this Class of address (using VLSM), the router said me that the mask is incorrect (Bad mask) and don't change anything.

I will implement a classless routing protocol (RIPv2).

Here the line of commands:

Router>
Router>enable
Router#config termin
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#int Ser0/0/0
Router(config-if)#ip address 172.16.199.228 255.255.255.252
Bad mask /30 for address 172.16.199.228                 <--- HERE
Router(config-if)#

How can I set an IP address with a no by defect mask?

Thanks you! :)