ICMP error

[Martin Patka]

Zdravim,

po pripojeni ISDN centraly na ethernet se mi na serveru zacali objevovat
hlasky:

194.213.243.6 sent an invalid ICMP error to a broadcast.
194.213.243.6 sent an invalid ICMP error to a broadcast.

(194.213.243.6 je ta ISDN/E1 karta.)


Zkusil jsem na to pustit tcpdump a tohle je vysledek:

[root na mikros /etc]# tcpdump -n 'src 194.213.243.6'
User level filter, protocol ALL, datagram packet socket
tcpdump: listening on all devices

11:05:07.986626 eth0 < 194.213.243.6 > 194.213.243.1: icmp: 194.213.243.255
udp port netbios-dgm unreachable
11:05:07.987558 eth0 < 194.213.243.6 > 194.213.243.1: icmp: 194.213.243.255
udp port netbios-dgm unreachable
 
94376 packets received by filter



Trosku mne zaskocila ta icmp adresa 194.213.243.255. Zarizeni je totiz na
podsiti 194.213.243.0 s maskou 255.255.255.192 a broadcast by tedy mel byt
194.213.243.63. Znamena to, ze ta karta nerespektuje masku ? 

Kdyz si vsak vypisu nastaveni, tak je maska zadana:

pSH+> ipconfig -d
Default Gateway: 194.213.243.2
Interface  IP Address      Subnet Mask
-------------------------------------------
le0        194.213.243.6   255.255.255.192



V cem muze byt problem ? 

Diky


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Martin Patka                      network & server administrator
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Mikroservis v.o.s.                e-mail:       smartin na mikroservis.cz
Nerudova 45                       phone work:   +420 431 624301,623719
51301, Semily 1                   phone home:   +420 431 624592
http://www.mikroservis.cz         http://www.mikroservis.cz/~martin
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