10 More Discussions You Might Find Interesting
1. Solaris
Hi.
I am attempting to set up an OpenVPN server on my Solaris 11 box by following all the Linux guides. Thus far I have a working VPN that I can connect to and ssh onto my VPN server over which is great but not what I require long term.
I would like to route all VPN client requests for addresses... (0 Replies)
Discussion started by: nickb1976
0 Replies
2. IP Networking
I need to configure a proxy on my local machine to use an upstream proxy (installed on another machine). The upstream proxy requires Digest/NTLM authorization. I want the local proxy to deal with the upstream proxy's authorization details and provides authorization free access to users that connect... (0 Replies)
Discussion started by: Russel
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3. Infrastructure Monitoring
Hello,
I am facing this scenario: three or more remote LAN (peripheral offices), with the same devices (printers, NAS) in each of them. Those LANs have the same network addresses, i.e.192.168.1.* (are connected to WAN via NAT).
I need to collect snmp traps from a central server (public IP).... (4 Replies)
Discussion started by: neutrino
4 Replies
4. Solaris
Hi everybody,
I'm running on Solaris 10 X86 (update 1009).
I would like to make NAT's rule. I explain you.
On Solaris, I configure the principal interface e1000g0 with IP : 192.168.0.33
I created the first logical interface like that :
ifconfig e1000g0 addif 192.168.0.40 netmask... (0 Replies)
Discussion started by: aureliensm
0 Replies
5. Shell Programming and Scripting
hellou, can anybody help me with nat detection in real time ? i prefer some detection script because i try some nat detection program's for example p0f or i'm using tcpdump, but i would get contain of specific packet. Some ideas? (1 Reply)
Discussion started by: TheTechnic
1 Replies
6. IP Networking
Hi,
I am involved in a project on Debian. One of my requirement is to route an IP packet in my application to a proxy server and receive the reply from the proxy server as an IP packet. My application handles data at the IP frame level. My application creates an IP packet(with all the necessary... (0 Replies)
Discussion started by: Rajesh_BK
0 Replies
7. IP Networking
Hi All,
Is there any possibility to change the IP address of a package according to its MAC address. It would be a sort of L2 NAT. (i.e. If the MAC address is 00:1A:A0:1E:XX:XX so the dir IP will be 192.168.X.X)
Thanks!. (4 Replies)
Discussion started by: lagigliaivan
4 Replies
8. IP Networking
i have a firewall with two interfaces eth0 and eth1, eth0 is connected to an external network, and eth0 is connected to a private lan.
im using this command for NAT
iptables -A POSTROUTING -t nat -s 192.168.0.0/24 -o eth0 -j SNAT --to-source 223.0.0.3
my questions are :
1) how can i... (4 Replies)
Discussion started by: ratamahatta
4 Replies
9. IP Networking
Hello Gurus!
I'm currently trying to configure NAT using proxy ARP on a SunOS 5.8 .
This box is running Check Point FW1 that sits behind my internet router.
I have a server that is connected to the firewall box. I want to translate this server using proxy ARP.
Settings:... (1 Reply)
Discussion started by: azzuwan
1 Replies
10. IP Networking
Hi All!
I have a Pentium 100 (32 MBRAM) with FreeBSD 4.4 installed on it and I am using it as a gateway. When I am downloading (or uploading) stuff simultaneously I see that natd is using up to 100% of the cpu capacity, hence the internet connection becomes blocked.
My guess is I will have... (1 Reply)
Discussion started by: Ivo
1 Replies
TFTP-PROXY(8) BSD System Manager's Manual TFTP-PROXY(8)
NAME
tftp-proxy -- Internet Trivial File Transfer Protocol proxy
SYNOPSIS
tftp-proxy [-v] [-w transwait]
DESCRIPTION
tftp-proxy is a proxy for the Internet Trivial File Transfer Protocol invoked by the inetd(8) internet server. TFTP connections should be
redirected to the proxy using the pf(4) rdr command, after which the proxy connects to the server on behalf of the client.
The proxy establishes a pf(4) rdr rule using the anchor facility to rewrite packets between the client and the server. Once the rule is
established, tftp-proxy forwards the initial request from the client to the server to begin the transfer. After transwait seconds, the pf(4)
NAT state is assumed to have been established and the rdr rule is deleted and the program exits. Once the transfer between the client and
the server is completed, the NAT state will naturally expire.
Assuming the TFTP command request is from $client to $server, the proxy connected to the server using the $proxy source address, and $port is
negotiated, tftp-proxy adds the following rule to the anchor:
rdr proto udp from $server to $proxy port $port -> $client
The options are as follows:
-v Log the connection and request information to syslogd(8).
-w transwait
Number of seconds to wait for the data transmission to begin before removing the pf(4) rdr rule. The default is 2 seconds.
CONFIGURATION
To make use of the proxy, pf.conf(5) needs the following rules. The anchors are mandatory. Adjust the rules as needed for your configura-
tion.
In the NAT section:
nat on $ext_if from $int_if -> ($ext_if:0)
no nat on $ext_if to port tftp
rdr-anchor "tftp-proxy/*"
rdr on $int_if proto udp from $lan to any port tftp ->
127.0.0.1 port 6969
In the filter section, an anchor must be added to hold the pass rules:
anchor "tftp-proxy/*"
inetd(8) must be configured to spawn the proxy on the port that packets are being forwarded to by pf(4). An example inetd.conf(5) entry fol-
lows:
127.0.0.1:6969 dgram udp wait root
/usr/libexec/tftp-proxy tftp-proxy
SEE ALSO
tftp(1), pf(4), pf.conf(5), ftp-proxy(8), inetd(8), syslogd(8), tftpd(8)
CAVEATS
tftp-proxy chroots to /var/chroot/tftp-proxy and changes to user ``_proxy'' to drop privileges.
BSD
May 31, 2007 BSD