Have you tried running tcpdump on the interface while you are sending
the pings from the outside?  This will confirm that the pings are being 
received, and might give a clue as to why the NetBSD system is not
responding.

Also, can you successfully ping the outside box from the NetBSD system?

On Sun, 3 Jan 1999, Stanislaw Szczygiel wrote:

> O.K, again about problems with ifaliases. This time with more
> informations about system and initialization files.  Problem is in
> lack of any result of working ifaliases:  they appear the same as in
> 1.3.2 (and then work very well), but in 1.3.3 - I see the effect of
> commands (see below) - the same as in working 1.3.2 NetBSD!!!  But
> ping on address 148.....161, 162, 164 - gives no echo.  But there is a
> little change between old system and new:  now I use 100MB SMC PCI
> cards, erlier there were 10MB netcards...  System works fine, speed is
> very well - so I think systemm see my cards well. But maybe there are
> some changes in drivers... I really dont know why this not work.
> Ok, lets see my parameters and effect of netstat.
> This is "ifaliases" file:
> 148.81.82.161 ep2 255.255.255.255
> 148.81.82.162 ep2 255.255.255.255
> 148.81.82.164 ep2 255.255.255.255
> This is effecy of netstat -in   and   netstat -nr
> Routing tables
> Internet:
> Destination        Gateway            Flags     Refs     Use    Mtu  Interface
> default            148.81.82.50       UGS         5      442      -  ep2
> 10                 link#1             UC          0        0      -  ep1
> 10.1.1.1           00:60:08:9b:a7:b0  UHL         1       24      -  lo0
> 10.1.1.2           00:00:c0:fe:a3:0d  UHL         0       36      -  ep1
> 127.0.0.1          127.0.0.1          UH         14       55      -  lo0
> 148.81.82/24       link#2             UC          0        0      -  ep2
> 148.81.82.34       08:00:20:80:93:86  UHL         0       42      -  ep2
> 148.81.82.50       00:00:a2:0a:41:45  UHL         1        0      -  ep2
> 148.81.82.161      127.0.0.1          UGHS        0        0      -  lo0
> =>
> 148.81.82.161/32   link#2             UC          0        0      -  ep2
> 148.81.82.162      127.0.0.1          UGHS        0        0      -  lo0
> =>
> 148.81.82.162/32   link#2             UC          0        0      -  ep2
> 148.81.82.164      127.0.0.1          UGHS        0        0      -  lo0
> =>
> 148.81.82.164/32   link#2             UC          0        0      -  ep2
> Name  Mtu   Network       Address              Ipkts Ierrs    Opkts Oerrs
>  Coll
> ep1   1500  <Link>        00:60:08:9b:a7:b0       51     0       38   
>  0     0
> ep1   1500  10            10.1.1.1                51     0       38   
>  0     0
> ep2   1500  <Link>        00:60:08:92:63:62      920     0      630   
>  0     0
> ep2   1500  148.81.82/24  148.81.82.163          920     0      630   
>  0     0
> ep2   1500  148.81.82.161 148.81.82.161          920     0      630   
>  0     0
> ep2   1500  148.81.82.162 148.81.82.162          920     0      630   
>  0     0
> ep2   1500  148.81.82.164 148.81.82.164          920     0      630   
>  0     0
> ne1*  1500  <Link>        00:01:1b:09:de:63        0     0        0   
>  0     0
> lo0   32976 <Link>                                79     0       79   
>  0     0
> lo0   32976 127           127.0.0.1               79     0       79   
>  0     0
> ppp0* 1500  <Link>                                 0     0        0   
>  0     0
> sl0*  296   <Link>                                 0     0        0   
>  0     0
> strip 1100  <Link>                                 0     0        0   
>  0     0
> tun0* 1500  <Link>                                 0     0        0   
>  0     0
> This is effect of ifconfig -a
> ep1: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu
> 1500
> address: 00:60:08:9b:a7:b0
> media: 100baseTX status: active
> inet 10.1.1.1 netmask 0xff000000 broadcast 10.255.255.255
> ep2: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu
> 1500
> address: 00:60:08:92:63:62
> media: 100baseTX status: active
> inet 148.81.82.163 netmask 0xffffff00 broadcast 148.81.82.255
> ne1: flags=8822<BROADCAST,NOTRAILERS,SIMPLEX,MULTICAST> mtu 1500
> address: 00:01:1b:09:de:63
> media: manual
> lo0: flags=8009<UP,LOOPBACK,MULTICAST> mtu 32976
> inet 127.0.0.1 netmask 0xff000000
> ppp0: flags=8010<POINTOPOINT,MULTICAST> mtu 1500
> sl0: flags=c010<POINTOPOINT,LINK2,MULTICAST> mtu 296
> strip0: flags=0<> mtu 1100
> tun0: flags=10<POINTOPOINT> mtu 1500
> Ping from localhost to ifaliases adressess work fine !!! 
> Ping from external hosts to this adressess is DEAD !!!!!
> I'm almost sure that problem is somewhere in netcard driver. From inside
> all addresses are visible - it means that ifalises work. But problem is
> with visibility from outside: maybe some problems with arp adresses? I
> know that there are some differenties beetwen 10MB  and 100MB cards in
> ARP.... Exactly my netcards are 3C905.
> Every notice usefull in resolving this problem is necessary! Thanks in
> advance.
> Stanley
> .... and sorry for my english...
> .... Blessed be the pessimist for he hath made backups.
> -- 
> -----
> |       TNX
> |____     BYE
>      \
>      |
> |____|TANLEY
> 
> 

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