Hello,

I have a DHCP server running on the firewall. But DHCP requests are
dropped by rpfilter, when this option is enabled for loc interface:

/etc/shorewall/interfaces
net     enp5s0 rpfilter,dhcp,nosmurfs,logmartians,sourceroute=0
loc enp6s0 rpfilter,dhcp,nosmurfs,logmartians

Log:
Jul 02 23:21:03 Sardegna kernel: Shorewall:rplog:DROP:IN=enp6s0 OUT=
MAC=ff:ff:ff:ff:ff:ff:78:97:68:45:0d:7f:08:00 SRC=0.0.0.0
DST=255.255.255.255 LEN=375 TOS=0x00 PREC=0x00 TTL=64 ID=51364
PROTO=UDP SPT=68 DPT=67 LEN=355
Jul 02 23:21:07 Sardegna kernel: Shorewall:rplog:DROP:IN=enp6s0 OUT=
MAC=ff:ff:ff:ff:ff:ff:78:97:68:45:0d:7f:08:00 SRC=0.0.0.0
DST=255.255.255.255 LEN=375 TOS=0x00 PREC=0x00 TTL=64 ID=58639
PROTO=UDP SPT=68 DPT=67 LEN=355
Jul 02 23:21:15 Sardegna kernel: Shorewall:rplog:DROP:IN=enp6s0 OUT=
MAC=ff:ff:ff:ff:ff:ff:78:97:68:45:0d:7f:08:00 SRC=0.0.0.0
DST=255.255.255.255 LEN=375 TOS=0x00 PREC=0x00 TTL=64 ID=59979
PROTO=UDP SPT=68 DPT=67 LEN=355

DHCP works as expected without rpfilter option for the loc interface.

Is it possible to use rpfilter on interfaces, on which DHCP server is listening?
`shorewall dump` is attached.

Regards.

Attachment: dump.txt.gz
Description: GNU Zip compressed data

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