If your PC has an ipportfw compatible kernel, this user guide should help you fix it.
Recommended: ASR Pro
IPPORTFW, IPAUTOFW, REDIR, UDPRED, and others appear to be generic TCP protocols and/or programs.UDP slot redirection tools for Linux IP Masquerade (for kernels < 2.4). ThisThe tools are typically used in conjunction with and as replacements for specific IP MASQ modules.to get accurate network traffic through MASQ internet computer.
With port forwarding, you have the ability to forward data connections from the Internet tointernal scrubber with private address behind your IP MASQ server. itRouting capabilities include network procedures such as TELNET, WWW, SMTP, FTP(with special patch 2. below), see ICQ and more.
NOTE. If you want to simplifyPort forwarding, but your whole family doesn’t need masking support, you really don’tChoice. You still need to enable IPSupport hiding in kernel AND running IPTABLES, IPCHAINS, aliasA set of IPFWADM rules to run Linux port forwarding tools.
Why different options? MARK (MFW), IPMASQADM or (portfw AUTOFW),IPPORTFW, IPAUTOFW, REDIR, and UDPRED (all URLs are usuallySection 3.2.3) there were various equipment available IPMASQend to enable this feature. Later than Linux, IPThe Masquerade feature matured, many of which were eventually replaced by many tools.PORTFW and MARK systems, which include more intelligent solutions.
High caffeine, usually 2.2.x kernels, IPMASQADM tool combined IPAUTOFW and IPPORTFW.Kernel 2.0.x workstation tools in a binary file. IPMASQADM Tool and IPTABLESsupports a new mechanism called “MARK” or MFW. The MARK process is running whenSome IPTABLES, also known as IPCHAINS rule sets, match a sequence of trusted packets.After the comparison, the tool should “tag” these packages. Later corresponding IPMASQADMA tool or a particular IPTABLE “table” may be responsible for modifying this type of package.as needed and deliver them to your chosen location. This is currentlyThe HOWTO cover does not mean a MARK solution, but probably in the near future.
In any case, since this is due to the availability of new options, *HIGHIt is NOT RECOMMENDED* to include old tools such as IPAUTOFW (even AUTOFW IPMASQADM).and REDIR because they are not andproperly inform the entire Linux kernel about theirThe presence associated with can eventually DESTROY youLinux server with extreme commitment.
NOTE #2. With portfw enabledbuilt into EVERY Linux kernel 2.2/2.0 (not 2.4.x).Computers generally CANNOT use the same “outside” PORTFWed IP address.Access to a specific “internal” machine. In other words, PORTFWwas intended only for general use with “external” computers on the Internet. WhenThat’s a factor for you, you can also use the REDIR tool for 2.2.x and up.Kernel 2.0.x allowing internal toys to be redirected to an internal surfacealso servers. Kernel 2.4.x is running on a treadmill This problem is solved by iptables once and for all, and so once and for allFinally, the FAQ entry is covered in section 7.19. If you might likea technical explanation of why this particular internal/external redirect is not working,Please scroll down until you see the 2.2.x PORTFW section has the full rating.Juan José Ciarlante.
NOTE E 3. Sending FTP server traffic to an internal FTP server with incredible MASQ security,just known because PORTFW FTP is now fully supportedsent in the 2.4.x kernel the same as in the 2.2.x kernel after the FTP BETA releaseKernel segment (NOT shipped with kernel) linus. It must be tooNote that you can also enable PORTFW FTP traffic with an optional FTP proxy program.(not covered in this HOWTO). It should be noted that FTP Beta 2.2.xKernel module code is always trial and error, and some people make the best improvements.Just use ACTIVE FTP sessions, not PASSIVE connections.Interestingly, many other people consider the opposite behavior to be correct.Please let us know about your results. Now more about itdiscussed below in versions 2.2.x and 2.0.x as sections requiring recommendationsusing different patches.
WARNING! before you jumpWhen installing NOTHING related to these tools, network security should always be mentioned.Actually can be solved with the EVERY PORT FORWARD tool. Causefor our this is because these tools basically make a hole in a solid containerRequires firewall for TCP/UDP ports. However, this poses no real danger.to your Linux machine, it could be an issue with the internal PORTFWCars). Don’t worry, that’s what Stephen Clark (authorIPPORTFW) found the following:
"Port forwarding is only called as part of the masquerading tasks, it complies with the same IPFWADM/IPCHAINS rules. The masquerade would be a continuation of this IP forwarding. So only ipportfw sees the packet when the concept matches both the ipfwadm keyboard input and the masking rules of thumb."Speed up your computer today by downloading the software here.