difference between port forwarding and a virtual network bridge

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Apologies if the question seems too stupid, but I'm just starting out.



Problem



I have two network interfaces 



eth0 Link encap:Ethernet HWaddr 00:04:35:00:01:21
 inet addr:172.24.176.221 Bcast:172.24.255.255 Mask:255.255.0.0
 inet6 addr: fe80::204:35ff:fe00:121/64 Scope:Link
 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
 RX packets:20754 errors:0 dropped:2 overruns:0 frame:0
 TX packets:5033 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000
 RX bytes:1462452 (1.3 MiB) TX bytes:613891 (599.5 KiB)
 Interrupt:27 Base address:0xb000
 RX bytes:3052 (2.9 KiB) TX bytes:3052 (2.9 KiB)

ppp0 Link encap:Point-to-Point Protocol
 inet addr:192.168.10.1 P-t-P:192.168.10.100 Mask:255.255.255.255
 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
 RX packets:446 errors:0 dropped:0 overruns:0 frame:0
 TX packets:293 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:3
 RX bytes:33085 (32.3 KiB) TX bytes:35555 (34.7 KiB)


Need to route UDP traffic on 192.168.10.1 (ppp0) port 9500 to 172.24.176.221 (eth0) port 9500 and visa versa, i.e. route UDP traffic on 172.24.176.221 port 9500 to 192.168.10.1 port 9500.



Some context.
ppp0 is a PPP running on a serial line. The command to instantiate it is pppd -detach persist debug local noauth passive xonxoff lock dump 192.168.10.1:192.168.10.100 /dev/ttyS0 9600



I've been reading online on how to do it and it seems I either need to make a virtual network bridge or I need to setup port forwarding.



My question is what exactly I need, port forwarding or a network bridge?






port-forwarding bridge






share

























    up vote
    0
    down vote

    favorite












    Apologies if the question seems too stupid, but I'm just starting out.



    Problem



    I have two network interfaces 



    eth0 Link encap:Ethernet HWaddr 00:04:35:00:01:21
     inet addr:172.24.176.221 Bcast:172.24.255.255 Mask:255.255.0.0
     inet6 addr: fe80::204:35ff:fe00:121/64 Scope:Link
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:20754 errors:0 dropped:2 overruns:0 frame:0
     TX packets:5033 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000
     RX bytes:1462452 (1.3 MiB) TX bytes:613891 (599.5 KiB)
     Interrupt:27 Base address:0xb000
     RX bytes:3052 (2.9 KiB) TX bytes:3052 (2.9 KiB)

    ppp0 Link encap:Point-to-Point Protocol
     inet addr:192.168.10.1 P-t-P:192.168.10.100 Mask:255.255.255.255
     UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
     RX packets:446 errors:0 dropped:0 overruns:0 frame:0
     TX packets:293 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:3
     RX bytes:33085 (32.3 KiB) TX bytes:35555 (34.7 KiB)


    Need to route UDP traffic on 192.168.10.1 (ppp0) port 9500 to 172.24.176.221 (eth0) port 9500 and visa versa, i.e. route UDP traffic on 172.24.176.221 port 9500 to 192.168.10.1 port 9500.



    Some context.
    ppp0 is a PPP running on a serial line. The command to instantiate it is pppd -detach persist debug local noauth passive xonxoff lock dump 192.168.10.1:192.168.10.100 /dev/ttyS0 9600



    I've been reading online on how to do it and it seems I either need to make a virtual network bridge or I need to setup port forwarding.



    My question is what exactly I need, port forwarding or a network bridge?






    port-forwarding bridge






    share























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      Apologies if the question seems too stupid, but I'm just starting out.



      Problem



      I have two network interfaces 



      eth0 Link encap:Ethernet HWaddr 00:04:35:00:01:21
       inet addr:172.24.176.221 Bcast:172.24.255.255 Mask:255.255.0.0
       inet6 addr: fe80::204:35ff:fe00:121/64 Scope:Link
       UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
       RX packets:20754 errors:0 dropped:2 overruns:0 frame:0
       TX packets:5033 errors:0 dropped:0 overruns:0 carrier:0
       collisions:0 txqueuelen:1000
       RX bytes:1462452 (1.3 MiB) TX bytes:613891 (599.5 KiB)
       Interrupt:27 Base address:0xb000
       RX bytes:3052 (2.9 KiB) TX bytes:3052 (2.9 KiB)

      ppp0 Link encap:Point-to-Point Protocol
       inet addr:192.168.10.1 P-t-P:192.168.10.100 Mask:255.255.255.255
       UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
       RX packets:446 errors:0 dropped:0 overruns:0 frame:0
       TX packets:293 errors:0 dropped:0 overruns:0 carrier:0
       collisions:0 txqueuelen:3
       RX bytes:33085 (32.3 KiB) TX bytes:35555 (34.7 KiB)


      Need to route UDP traffic on 192.168.10.1 (ppp0) port 9500 to 172.24.176.221 (eth0) port 9500 and visa versa, i.e. route UDP traffic on 172.24.176.221 port 9500 to 192.168.10.1 port 9500.



      Some context.
      ppp0 is a PPP running on a serial line. The command to instantiate it is pppd -detach persist debug local noauth passive xonxoff lock dump 192.168.10.1:192.168.10.100 /dev/ttyS0 9600



      I've been reading online on how to do it and it seems I either need to make a virtual network bridge or I need to setup port forwarding.



      My question is what exactly I need, port forwarding or a network bridge?






      port-forwarding bridge






      share













      Apologies if the question seems too stupid, but I'm just starting out.



      Problem



      I have two network interfaces 



      eth0 Link encap:Ethernet HWaddr 00:04:35:00:01:21
       inet addr:172.24.176.221 Bcast:172.24.255.255 Mask:255.255.0.0
       inet6 addr: fe80::204:35ff:fe00:121/64 Scope:Link
       UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
       RX packets:20754 errors:0 dropped:2 overruns:0 frame:0
       TX packets:5033 errors:0 dropped:0 overruns:0 carrier:0
       collisions:0 txqueuelen:1000
       RX bytes:1462452 (1.3 MiB) TX bytes:613891 (599.5 KiB)
       Interrupt:27 Base address:0xb000
       RX bytes:3052 (2.9 KiB) TX bytes:3052 (2.9 KiB)

      ppp0 Link encap:Point-to-Point Protocol
       inet addr:192.168.10.1 P-t-P:192.168.10.100 Mask:255.255.255.255
       UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
       RX packets:446 errors:0 dropped:0 overruns:0 frame:0
       TX packets:293 errors:0 dropped:0 overruns:0 carrier:0
       collisions:0 txqueuelen:3
       RX bytes:33085 (32.3 KiB) TX bytes:35555 (34.7 KiB)


      Need to route UDP traffic on 192.168.10.1 (ppp0) port 9500 to 172.24.176.221 (eth0) port 9500 and visa versa, i.e. route UDP traffic on 172.24.176.221 port 9500 to 192.168.10.1 port 9500.



      Some context.
      ppp0 is a PPP running on a serial line. The command to instantiate it is pppd -detach persist debug local noauth passive xonxoff lock dump 192.168.10.1:192.168.10.100 /dev/ttyS0 9600



      I've been reading online on how to do it and it seems I either need to make a virtual network bridge or I need to setup port forwarding.



      My question is what exactly I need, port forwarding or a network bridge?






      port-forwarding bridge




      port-forwarding bridge





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