Firewall
pf 極大地降低了流量
我在 FreeBSD 9.1 上執行 Web 和郵件伺服器。該系統安裝在 KVM vServer 上。一切正常 - 直到我啟用 pf(4)。我的部落格變得異常緩慢。所有其他流量也是如此,但這並不是那麼煩人。
因此,如果有人能告訴我問題可能出在哪裡,那就太好了。
提前致謝!
使用 benchmarks/iperf 的測試返回以下結果:
禁用 pf:
Client connecting to 109.193.XXX.XXX, TCP port 5001 TCP window size: 32.5 KByte (default) ------------------------------------------------------------ [ 3] local 46.38.XXX.XXX port 31302 connected with 109.193.XXX.XXX port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 15.1 MBytes 12.6 Mbits/sec
啟用 pf:
------------------------------------------------------------ Client connecting to 109.193.XXX.XXX, TCP port 5001 TCP window size: 32.5 KByte (default) ------------------------------------------------------------ [ 3] local 46.38.XXX.XXX port 61377 connected with 109.193.XXX.XXX port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-18.1 sec 128 KBytes 58.1 Kbits/sec
這是我的 pf.conf:
### INTERFACES ### if = "{ em0 }" ### SETTINGS ### set block-policy drop ### PORTS ### tcp_pass = "{ 25 80 465 993}" udp_pass = "{ 25 80 465 993}" icmp_types = "echoreq" ### NORMALISATION ### scrub in all antispoof for $if ### RULES ### block all pass in on $if proto tcp from any to any port $tcp_pass flags S/SA keep state pass in on $if proto udp to any port $udp_pass keep state pass out quick all keep state # PING # pass in on $if inet proto icmp all icmp-type $icmp_types keep state # TRACEROUTE # pass in on $if inet proto udp from any to any port 33433 >< 33626 keep state
這是 rc.conf: … pf_enable=“YES” pf_rules="/etc/pf.conf" pflog_enable=“YES” pflog_logfile="/var/log/pflog" …
9.0 分支似乎對涉及 TCP 分段解除安裝的奇怪配置特別敏感。這可以通過禁用 TSO 來“糾正”:
ifconfig em0 -tso