Am 23.06.2020 14:49, schrieb Marek Greško:
Hi Marek,
this could be ip address of the different interface on the same box. I
think it works like expected. The only exception would be if the sip
peer ignores the icmp packet unreachable. But I doubt this is the
Do you mean "my Linux-Box ignores ICMP packet unreachable" or "Deutsche
Telekom ignores them"?
case. Anyway you get problems also when calling to LTE phone without
using sip provider.
I have problem calling someone outside my networks and I have problem if
the peers are in different networks...
Let first concentrate on these calls LTE to LAN. Are you sure you do
not block incoming icmp unreachables? At least verify type 3 subtype 4
is enabled. If it is, I have no clue what is going on.
Well, I limit incoming ICMP packets and I block some hosts (known
crackers)...
If you think, I can send you the script I use (with iptables) to manage
my firewall, so you can check it...
The only entries I have, having something to do with ICMP, are:
----------------------------------
/bin/echo -n "Disable ICMP Redirect acceptance..."
for f in /proc/sys/net/ipv4/conf/*/accept_redirects; do
/bin/echo 0 > $f
done
/bin/echo "done."
/sbin/iptables -A INPUT -i dsl0 -p icmp --icmp-type echo-request -m
limit --limit 6/m --limit-burst 5 -j ACCEPT
/sbin/iptables -A FORWARD -o dsl0 -p icmp -j ACCEPT
----------------------------------
and of course other rules to allow ICMP pakets in the internal
networks...
Thanks a lot
Luca Bertoncello
(lucab...@lucabert.de)
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